Environmental and conservation organizations - Membership in the US 1950-2006 | Statista

This graph shows the number of members in national environmental and conservation organizations in the United States from 1950-51 to 2005-06. In 1950-51, membership amounted to 74,400 people.

Membership in national environmental and conservation organizations in the United States from 1950-51 to 2005-2006

Characteristic	Number of members
1950-51	74,400
1960-61	124,500
1965-66	438,500
1970-71	1,018,000
1975-76	1,391,500
1980-81	2,185,430
1985-86	4,263,000
1991-92	7,664,179
1996-97	7,859,830
2002-03	8,333,819
2005-06	8,696,387

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Release date

December 2008

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Region

United States

Survey time period

1950-51 to 2005-2006

Supplementary notes

This data only considers organizations which filled the Form 990. The IRS Form 990 is titled "Return of Organization Exempt From Income Tax." It is submitted by tax-exempt organizations and non-profit organizations to provide the Internal Revenue Service with annual financial information.

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