| Year | Value | | 2021 | 7,812,828.497 | | 2020 | 7,807,223.443 | | 2019 | 7,808,969.458 | | 2018 | 7,811,699.503 | | 2017 | 7,813,567.219 | | 2016 | 7,782,127.8 | | 2015 | 7,770,645.279 | | 2014 | 7,753,561.761 | | 2013 | 7,759,388.696 | | 2012 | 7,757,546.255 | | 2011 | 7,759,877.938 | | 2010 | 7,753,009.3 | | 2009 | 7,751,493.562 | | 2008 | 7,734,912.556 | | 2007 | 7,717,887.111 | | 2006 | 7,694,123.667 | | 2005 | 7,662,163.322 | | 2004 | 7,649,703.778 | | 2003 | 7,628,493.733 | | 2002 | 7,763,755.889 | | 2001 | 7,742,749.444 | | 2000 | 7,714,858 | | 1999 | 7,691,815.5 | | 1998 | 7,655,039 | | 1997 | 7,645,854.5 | | 1996 | 7,530,494 | | 1995 | 7,522,551 | | 1994 | 7,511,848 | | 1993 | 7,469,331 | | 1992 | 7,467,440 | | 1991 | 7,464,248 | | 1990 | 7,435,414 | | 1989 | 7,363,117 | | 1988 | 7,288,916 | | 1987 | 7,213,839 | | 1986 | 7,122,561 | | 1985 | 7,036,915.5 | | 1984 | 6,882,669.2 | | 1983 | 6,776,368.4 | | 1982 | 6,665,295.9 | | 1981 | 6,562,695.9 | | 1980 | 6,504,248 | | 1979 | 6,452,739.1 | | 1978 | 6,412,108 | | 1977 | 6,345,372.067 | | 1976 | 6,271,317.533 | | 1975 | 6,353,569.4 | | 1974 | 6,299,202.7 | | 1973 | 6,220,286.9 | | 1972 | 6,157,208.3 | | 1971 | 6,099,205.8 | | 1970 | 6,060,583.1 | | 1969 | 6,008,627.4 | | 1968 | 5,961,551 | | 1967 | 5,922,084.8 | | 1966 | 5,880,499.3 | | 1965 | 5,840,511.4 | | 1964 | 5,799,008.2 | | 1963 | 5,763,306.7 | | 1962 | 5,728,347.5 | | 1961 | 5,695,405.4 |
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