| Year | Value | | 2021 | 5,236,390.685 | | 2020 | 5,236,720.506 | | 2019 | 5,228,038.143 | | 2018 | 5,236,246.657 | | 2017 | 5,238,175.133 | | 2016 | 5,232,064.896 | | 2015 | 5,223,517.789 | | 2014 | 5,218,516.355 | | 2013 | 5,219,117.741 | | 2012 | 5,212,816.327 | | 2011 | 5,467,539.764 | | 2010 | 5,465,344.5 | | 2009 | 5,460,153 | | 2008 | 5,459,721.164 | | 2007 | 5,467,966.889 | | 2006 | 5,460,826.103 | | 2005 | 5,451,098.859 | | 2004 | 5,443,305.778 | | 2003 | 5,436,546.769 | | 2002 | 5,410,951.731 | | 2001 | 5,400,981.989 | | 2000 | 5,397,877.131 | | 1999 | 5,393,146.998 | | 1998 | 5,321,573.175 | | 1997 | 5,238,830.532 | | 1996 | 5,169,300.405 | | 1995 | 5,088,065.327 | | 1994 | 5,002,289.896 | | 1993 | 4,913,206.8 | | 1992 | 4,807,704.8 | | 1991 | 4,785,769 | | 1990 | 4,778,892 | | 1989 | 4,722,858 | | 1988 | 4,653,330 | | 1987 | 4,571,120 | | 1986 | 4,495,378 | | 1985 | 4,415,838 | | 1984 | 4,347,793.6 | | 1983 | 4,291,507.4 | | 1982 | 4,284,913.4 | | 1981 | 4,281,376 | | 1980 | 4,322,830 | | 1979 | 4,311,890 | | 1978 | 4,310,200 | | 1977 | 4,304,200 | | 1976 | 4,301,170 | | 1975 | 4,291,630 | | 1974 | 4,294,510 | | 1973 | 4,287,160 | | 1972 | 4,287,600 | | 1971 | 4,272,170 | | 1970 | 4,254,190 | | 1969 | 4,245,470 | | 1968 | 4,237,730 | | 1967 | 4,233,600 | | 1966 | 4,226,410 | | 1965 | 4,225,330 | | 1964 | 4,222,000 | | 1963 | 4,220,510 | | 1962 | 4,217,190 | | 1961 | 4,217,020 |
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