| July, 1990 | World Resources Institute, in collaboration with the United Nations Environment Programme and the United Nations ... |
| March, 1992 | World Resources Institute in collaboration with the United Nations Environment Programme and the United Nations ... |
| March, 1994 | World Resources Institute in collaboration with the United Nations Environment Programe and the United Nations ... |
| April, 1996 | World Resources Institute, United Nations Environment Programme, United Nations Development Programme, and the ... |
| July, 2003 | United Nations Development Programme, United Nations Environment Programme, World Bank, World Resources Institute
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| July, 2008 | United Nations Development Programme, United Nations Environment Programme, World Bank, World Resources Institute
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| July, 2004 | World Resources Institute
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