policy_source_title: totals

abs rel
House Committees 32 6.2%
EUR-Lex 29 5.6%
Publications Office of the European Union 29 5.6%
World Meteorological Organization 29 5.6%
Government Publishing Office 27 5.2%
National Renewable Energy Laboratory 22 4.2%
Law Commission 18 3.5%
State of Maryland 11 2.1%
The UK Government 11 2.1%
State of California 10 1.9%
Federal Register 9 1.7%
State of Colorado 9 1.7%
State of Hawaii 9 1.7%
Brookings Institute 8 1.5%
Government of Canada 8 1.5%
RAND Corporation 8 1.5%
State of Texas 8 1.5%
Commonwealth of Pennsylvania 7 1.3%
EPA 7 1.3%
Joint Research Centre 7 1.3%
NBER 7 1.3%
UNESCO 7 1.3%
Senate Committees 6 1.2%
State of Alaska 6 1.2%
Cato Institute 5 1.0%
European Parliamentary Research Service 5 1.0%
Guidelines in PubMed Central 5 1.0%
Hansard UK 5 1.0%
Mercatus Center 5 1.0%
State of Indiana 5 1.0%
World Bank 5 1.0%
Analysis & Policy Observatory 4 0.8%
Congressional Record 4 0.8%
European Parliament Plenary 4 0.8%
IIASA 4 0.8%
NHS Trusts 4 0.8%
State of Washington 4 0.8%
Centers for Disease Control and Prevention (CDC) 3 0.6%
European Parliament Committees 3 0.6%
Inter-American Development Bank 3 0.6%
NHS Scotland 3 0.6%
NICE 3 0.6%
Regeringskansliet 3 0.6%
State of Georgia 3 0.6%
State of Michigan 3 0.6%
State of Minnesota 3 0.6%
State of North Carolina 3 0.6%
World Health Organization 3 0.6%
ASPE 2 0.4%
Arctic Council 2 0.4%
Asian Development Bank 2 0.4%
Banco de España 2 0.4%
Boletín Oficial del Estado 2 0.4%
CGIAR 2 0.4%
Congressional Research Service 2 0.4%
Food and Agriculture Organization of the United Nations 2 0.4%
IZA Institute of Labor Economics 2 0.4%
Korea Development Institute 2 0.4%
Manhattan Institute 2 0.4%
New York State 2 0.4%
State of Idaho 2 0.4%
State of Illinois 2 0.4%
State of Louisiana 2 0.4%
State of Missouri 2 0.4%
Sveriges Riksdag 2 0.4%
U.S. Government Accountability Office 2 0.4%
AHRQ 1 0.2%
American Legislative Exchange Council 1 0.2%
An Roinn Dlí agus Cirt 1 0.2%
Australian Government Department of the Environment and Energy 1 0.2%
BIS 1 0.2%
Baden-Wüerttemberg.de 1 0.2%
Bayerische Staatsregierung 1 0.2%
Belgian Health Care Knowledge Centre 1 0.2%
Boston Consulting Group 1 0.2%
C.D. Howe Institute 1 0.2%
CEEPR 1 0.2%
Canadian Agency for Drugs and Technologies in Health 1 0.2%
Carnegie Endowment for International Peace 1 0.2%
Center for Court Innovation 1 0.2%
Center for Global Development 1 0.2%
Chatham House 1 0.2%
City of Detroit 1 0.2%
City of Houston 1 0.2%
City of Los Angeles 1 0.2%
City of New York 1 0.2%
City of Seattle 1 0.2%
Colorado General Assembly Legislative Council 1 0.2%
Commonwealth Fund 1 0.2%
Commonwealth of Massachusetts 1 0.2%
Commonwealth of Virginia 1 0.2%
Council of Europe (CDPC) 1 0.2%
Council of Europe (Parliamentary Assembly) 1 0.2%
Council of the European Union 1 0.2%
DOC Research Institute 1 0.2%
Ecologic Institute 1 0.2%
European Marine Board 1 0.2%
French Government Ministries 1 0.2%
Government of India 1 0.2%
Government of Italy 1 0.2%
Government of Latvia 1 0.2%
Government of Singapore 1 0.2%
Government of Switzerland 1 0.2%
Government of the Philippines 1 0.2%
Hansard Canada 1 0.2%
Heritage Foundation 1 0.2%
Independence Institute 1 0.2%
Institute for Defense Analysis 1 0.2%
Irish Environmental Protection Agency 1 0.2%
Konrad Adenauer Stiftung 1 0.2%
La Documentation Française 1 0.2%
Northern Ireland Assembly Research and Information Service 1 0.2%
Northern Ireland Executive 1 0.2%
Norwegian Environment Agency 1 0.2%
Office National des Forêts 1 0.2%
Office for National Statistics 1 0.2%
Office of the Surgeon General 1 0.2%
PBL Netherlands Environmental Assessment Agency 1 0.2%
Province of Nova Scotia 1 0.2%
Royal College of Psychiatrists 1 0.2%
Royal Society 1 0.2%
State of Tennessee 1 0.2%
Sustainable Development Policy Institute 1 0.2%
The Cobden Centre 1 0.2%
UK Parliament Select Committee Publications 1 0.2%
UNAIDS 1 0.2%
Umwelt Bundesamt 1 0.2%
United Nations 1 0.2%
United Nations CEPAL 1 0.2%
WWF 1 0.2%
World Economic Forum 1 0.2%
World Energy Council 1 0.2%
World Resources Institute 1 0.2%
Zorginstituut Nederland 1 0.2%

policy_source_title: per year

1981

abs rel
IIASA 1 100.0%

1982

abs rel
IIASA 1 100.0%

1986

abs rel
IIASA 1 100.0%

1989

abs rel
Government of Canada 1 100.0%

1999

abs rel
World Meteorological Organization 2 66.7%
EPA 1 33.3%

2000

abs rel
State of Alaska 1 50.0%
UNESCO 1 50.0%

2001

abs rel
National Renewable Energy Laboratory 2 40.0%
Congressional Research Service 1 20.0%
State of Georgia 1 20.0%
The UK Government 1 20.0%

2002

abs rel
Government Publishing Office 2 66.7%
Centers for Disease Control and Prevention (CDC) 1 33.3%

2003

abs rel
EPA 1 50.0%
Umwelt Bundesamt 1 50.0%

2004

abs rel
Joint Research Centre 2 66.7%
World Energy Council 1 33.3%

2005

abs rel
The UK Government 2 66.7%
State of California 1 33.3%

2006

abs rel
City of New York 1 33.3%
Regeringskansliet 1 33.3%
World Meteorological Organization 1 33.3%

2007

abs rel
State of Texas 2 40.0%
Senate Committees 1 20.0%
The UK Government 1 20.0%
U.S. Government Accountability Office 1 20.0%

2008

abs rel
Government Publishing Office 2 25.0%
Bayerische Staatsregierung 1 12.5%
New York State 1 12.5%
Senate Committees 1 12.5%
U.S. Government Accountability Office 1 12.5%
UNESCO 1 12.5%
World Meteorological Organization 1 12.5%

2009

abs rel
Joint Research Centre 2 22.2%
NHS Scotland 2 22.2%
Government Publishing Office 1 11.1%
Guidelines in PubMed Central 1 11.1%
IIASA 1 11.1%
PBL Netherlands Environmental Assessment Agency 1 11.1%
UNESCO 1 11.1%

2010

abs rel
Government Publishing Office 2 25.0%
World Meteorological Organization 2 25.0%
Food and Agriculture Organization of the United Nations 1 12.5%
Heritage Foundation 1 12.5%
NHS Scotland 1 12.5%
Publications Office of the European Union 1 12.5%

2011

abs rel
Brookings Institute 2 15.4%
CGIAR 2 15.4%
Commonwealth Fund 1 7.7%
Government Publishing Office 1 7.7%
Government of Canada 1 7.7%
Joint Research Centre 1 7.7%
NICE 1 7.7%
Publications Office of the European Union 1 7.7%
UNESCO 1 7.7%
World Meteorological Organization 1 7.7%
Zorginstituut Nederland 1 7.7%

2012

abs rel
House Committees 2 28.6%
EPA 1 14.3%
Institute for Defense Analysis 1 14.3%
Northern Ireland Assembly Research and Information Service 1 14.3%
State of Alaska 1 14.3%
UNESCO 1 14.3%

2013

abs rel
Publications Office of the European Union 2 11.8%
State of Washington 2 11.8%
ASPE 1 5.9%
Analysis & Policy Observatory 1 5.9%
EPA 1 5.9%
Government Publishing Office 1 5.9%
House Committees 1 5.9%
Independence Institute 1 5.9%
Joint Research Centre 1 5.9%
State of Alaska 1 5.9%
State of California 1 5.9%
State of Colorado 1 5.9%
State of Minnesota 1 5.9%
State of Missouri 1 5.9%
World Meteorological Organization 1 5.9%

2014

abs rel
Government Publishing Office 4 18.2%
World Meteorological Organization 4 18.2%
Publications Office of the European Union 3 13.6%
An Roinn Dlí agus Cirt 1 4.5%
Baden-Wüerttemberg.de 1 4.5%
Boletín Oficial del Estado 1 4.5%
Brookings Institute 1 4.5%
European Parliamentary Research Service 1 4.5%
Federal Register 1 4.5%
NICE 1 4.5%
New York State 1 4.5%
Office National des Forêts 1 4.5%
RAND Corporation 1 4.5%
WWF 1 4.5%

2015

abs rel
State of Maryland 5 16.1%
World Meteorological Organization 3 9.7%
Cato Institute 2 6.5%
Federal Register 2 6.5%
Government Publishing Office 2 6.5%
Boston Consulting Group 1 3.2%
Brookings Institute 1 3.2%
Centers for Disease Control and Prevention (CDC) 1 3.2%
City of Houston 1 3.2%
European Parliamentary Research Service 1 3.2%
Government of Canada 1 3.2%
Northern Ireland Executive 1 3.2%
Publications Office of the European Union 1 3.2%
RAND Corporation 1 3.2%
Senate Committees 1 3.2%
State of California 1 3.2%
State of Georgia 1 3.2%
State of Hawaii 1 3.2%
State of Louisiana 1 3.2%
State of Michigan 1 3.2%
The Cobden Centre 1 3.2%
The UK Government 1 3.2%

2016

abs rel
Government Publishing Office 3 11.1%
Publications Office of the European Union 3 11.1%
State of Maryland 3 11.1%
EPA 2 7.4%
European Parliamentary Research Service 2 7.4%
Arctic Council 1 3.7%
Brookings Institute 1 3.7%
City of Seattle 1 3.7%
Federal Register 1 3.7%
Government of Singapore 1 3.7%
Government of Switzerland 1 3.7%
Guidelines in PubMed Central 1 3.7%
Manhattan Institute 1 3.7%
Mercatus Center 1 3.7%
NBER 1 3.7%
NICE 1 3.7%
State of Illinois 1 3.7%
World Bank 1 3.7%
World Meteorological Organization 1 3.7%

2017

abs rel
House Committees 7 12.5%
State of Colorado 7 12.5%
Government of Canada 3 5.4%
Publications Office of the European Union 3 5.4%
State of Alaska 3 5.4%
Analysis & Policy Observatory 2 3.6%
Brookings Institute 2 3.6%
Government Publishing Office 2 3.6%
Hansard UK 2 3.6%
NBER 2 3.6%
National Renewable Energy Laboratory 2 3.6%
State of California 2 3.6%
State of North Carolina 2 3.6%
American Legislative Exchange Council 1 1.8%
Arctic Council 1 1.8%
Colorado General Assembly Legislative Council 1 1.8%
Congressional Record 1 1.8%
Hansard Canada 1 1.8%
Manhattan Institute 1 1.8%
Mercatus Center 1 1.8%
NHS Trusts 1 1.8%
RAND Corporation 1 1.8%
Royal Society 1 1.8%
State of Indiana 1 1.8%
State of Louisiana 1 1.8%
State of Maryland 1 1.8%
State of Michigan 1 1.8%
State of Minnesota 1 1.8%
State of Texas 1 1.8%
World Meteorological Organization 1 1.8%

2018

abs rel
Commonwealth of Pennsylvania 7 13.7%
House Committees 7 13.7%
Government Publishing Office 4 7.8%
NHS Trusts 2 3.9%
National Renewable Energy Laboratory 2 3.9%
Publications Office of the European Union 2 3.9%
State of Indiana 2 3.9%
State of Texas 2 3.9%
The UK Government 2 3.9%
World Meteorological Organization 2 3.9%
Australian Government Department of the Environment and Energy 1 2.0%
C.D. Howe Institute 1 2.0%
CEEPR 1 2.0%
Chatham House 1 2.0%
City of Los Angeles 1 2.0%
Congressional Record 1 2.0%
Congressional Research Service 1 2.0%
Council of Europe (CDPC) 1 2.0%
EPA 1 2.0%
Ecologic Institute 1 2.0%
Government of the Philippines 1 2.0%
RAND Corporation 1 2.0%
Regeringskansliet 1 2.0%
Senate Committees 1 2.0%
State of California 1 2.0%
State of Idaho 1 2.0%
State of Minnesota 1 2.0%
State of Washington 1 2.0%
Sveriges Riksdag 1 2.0%

2019

abs rel
EUR-Lex 18 24.3%
Publications Office of the European Union 6 8.1%
House Committees 5 6.8%
State of Hawaii 5 6.8%
National Renewable Energy Laboratory 4 5.4%
Government Publishing Office 3 4.1%
State of California 3 4.1%
State of Texas 3 4.1%
Congressional Record 2 2.7%
Guidelines in PubMed Central 2 2.7%
Mercatus Center 2 2.7%
RAND Corporation 2 2.7%
World Bank 2 2.7%
World Meteorological Organization 2 2.7%
Analysis & Policy Observatory 1 1.4%
City of Detroit 1 1.4%
Federal Register 1 1.4%
Food and Agriculture Organization of the United Nations 1 1.4%
Government of Canada 1 1.4%
Government of Italy 1 1.4%
Government of Latvia 1 1.4%
Joint Research Centre 1 1.4%
Province of Nova Scotia 1 1.4%
State of Idaho 1 1.4%
State of Illinois 1 1.4%
State of Washington 1 1.4%
The UK Government 1 1.4%
UK Parliament Select Committee Publications 1 1.4%
World Economic Forum 1 1.4%

2020

abs rel
House Committees 6 10.3%
National Renewable Energy Laboratory 4 6.9%
EUR-Lex 3 5.2%
Inter-American Development Bank 3 5.2%
NBER 3 5.2%
Publications Office of the European Union 3 5.2%
World Meteorological Organization 3 5.2%
Federal Register 2 3.4%
Senate Committees 2 3.4%
State of Maryland 2 3.4%
AHRQ 1 1.7%
Brookings Institute 1 1.7%
Cato Institute 1 1.7%
Center for Global Development 1 1.7%
Commonwealth of Massachusetts 1 1.7%
Commonwealth of Virginia 1 1.7%
Council of the European Union 1 1.7%
European Parliament Committees 1 1.7%
French Government Ministries 1 1.7%
Guidelines in PubMed Central 1 1.7%
IZA Institute of Labor Economics 1 1.7%
Irish Environmental Protection Agency 1 1.7%
Konrad Adenauer Stiftung 1 1.7%
Korea Development Institute 1 1.7%
La Documentation Française 1 1.7%
Mercatus Center 1 1.7%
Norwegian Environment Agency 1 1.7%
RAND Corporation 1 1.7%
State of Georgia 1 1.7%
State of Indiana 1 1.7%
State of Michigan 1 1.7%
State of Missouri 1 1.7%
State of Tennessee 1 1.7%
The UK Government 1 1.7%
World Bank 1 1.7%
World Health Organization 1 1.7%
World Resources Institute 1 1.7%

2021

abs rel
Law Commission 9 11.2%
EUR-Lex 8 10.0%
National Renewable Energy Laboratory 8 10.0%
European Parliament Plenary 4 5.0%
House Committees 4 5.0%
World Meteorological Organization 4 5.0%
Hansard UK 3 3.8%
State of Hawaii 3 3.8%
Asian Development Bank 2 2.5%
Banco de España 2 2.5%
Cato Institute 2 2.5%
European Parliament Committees 2 2.5%
Federal Register 2 2.5%
Publications Office of the European Union 2 2.5%
The UK Government 2 2.5%
UNESCO 2 2.5%
BIS 1 1.2%
Belgian Health Care Knowledge Centre 1 1.2%
Canadian Agency for Drugs and Technologies in Health 1 1.2%
Center for Court Innovation 1 1.2%
Council of Europe (Parliamentary Assembly) 1 1.2%
European Marine Board 1 1.2%
European Parliamentary Research Service 1 1.2%
Government of India 1 1.2%
IZA Institute of Labor Economics 1 1.2%
NBER 1 1.2%
NHS Trusts 1 1.2%
Regeringskansliet 1 1.2%
Royal College of Psychiatrists 1 1.2%
State of California 1 1.2%
State of Colorado 1 1.2%
State of Indiana 1 1.2%
State of North Carolina 1 1.2%
Sustainable Development Policy Institute 1 1.2%
United Nations CEPAL 1 1.2%
World Bank 1 1.2%
World Health Organization 1 1.2%

2022

abs rel
Law Commission 9 40.9%
Publications Office of the European Union 2 9.1%
ASPE 1 4.5%
Boletín Oficial del Estado 1 4.5%
Carnegie Endowment for International Peace 1 4.5%
Centers for Disease Control and Prevention (CDC) 1 4.5%
Office for National Statistics 1 4.5%
RAND Corporation 1 4.5%
Sveriges Riksdag 1 4.5%
UNAIDS 1 4.5%
United Nations 1 4.5%
World Health Organization 1 4.5%
World Meteorological Organization 1 4.5%

policy_source_title: missing year

abs rel
DOC Research Institute 1 25.0%
Government of Canada 1 25.0%
Korea Development Institute 1 25.0%
Office of the Surgeon General 1 25.0%