| Year | Value | | 2021 | 7,786,882.497 | | 2020 | 7,781,277.443 | | 2019 | 7,783,023.458 | | 2018 | 7,785,703.503 | | 2017 | 7,787,571.219 | | 2016 | 7,755,931.8 | | 2015 | 7,744,349.279 | | 2014 | 7,727,265.761 | | 2013 | 7,733,092.696 | | 2012 | 7,731,250.255 | | 2011 | 7,733,581.938 | | 2010 | 7,726,213.3 | | 2009 | 7,724,797.562 | | 2008 | 7,708,416.556 | | 2007 | 7,691,891.111 | | 2006 | 7,668,127.667 | | 2005 | 7,636,167.322 | | 2004 | 7,624,207.778 | | 2003 | 7,602,997.733 | | 2002 | 7,738,259.889 | | 2001 | 7,717,253.444 | | 2000 | 7,689,362 | | 1999 | 7,666,319.5 | | 1998 | 7,629,543 | | 1997 | 7,620,358.5 | | 1996 | 7,504,998 | | 1995 | 7,496,055 | | 1994 | 7,485,352 | | 1993 | 7,443,835 | | 1992 | 7,442,144 | | 1991 | 7,438,952 | | 1990 | 7,410,238 | | 1989 | 7,337,971 | | 1988 | 7,263,770 | | 1987 | 7,188,693 | | 1986 | 7,097,415 | | 1985 | 7,011,769.5 | | 1984 | 6,857,523.2 | | 1983 | 6,751,222.4 | | 1982 | 6,640,149.9 | | 1981 | 6,537,549.9 | | 1980 | 6,479,102 | | 1979 | 6,428,443.1 | | 1978 | 6,387,812 | | 1977 | 6,321,076.067 | | 1976 | 6,247,021.533 | | 1975 | 6,329,273.4 | | 1974 | 6,274,906.7 | | 1973 | 6,195,990.9 | | 1972 | 6,133,412.3 | | 1971 | 6,075,409.8 | | 1970 | 6,036,787.1 | | 1969 | 5,984,831.4 | | 1968 | 5,937,755 | | 1967 | 5,898,288.8 | | 1966 | 5,856,703.3 | | 1965 | 5,816,715.4 | | 1964 | 5,775,211.2 | | 1963 | 5,739,509.7 | | 1962 | 5,704,550.5 | | 1961 | 5,671,608.4 |
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