| Year | Value | | 2021 | 3,747,214.785 | | 2020 | 3,747,193.873 | | 2019 | 3,738,062.876 | | 2018 | 3,745,577.057 | | 2017 | 3,745,781.733 | | 2016 | 3,736,990.696 | | 2015 | 3,731,310.289 | | 2014 | 3,729,396.055 | | 2013 | 3,729,739.441 | | 2012 | 3,727,289.727 | | 2011 | 3,725,587.064 | | 2010 | 3,723,734.8 | | 2009 | 3,719,986 | | 2008 | 3,725,150.164 | | 2007 | 3,749,130.889 | | 2006 | 3,744,807.103 | | 2005 | 3,740,756.859 | | 2004 | 3,908,430.778 | | 2003 | 3,900,000.769 | | 2002 | 3,891,671.731 | | 2001 | 3,884,881.989 | | 2000 | 3,877,667.131 | | 1999 | 3,883,136.998 | | 1998 | 3,825,103.175 | | 1997 | 3,735,540.532 | | 1996 | 3,674,980.405 | | 1995 | 3,600,665.327 | | 1994 | 3,529,829.896 | | 1993 | 3,454,776.8 | | 1992 | 3,372,964.8 | | 1991 | 3,353,769 | | 1990 | 3,332,592 | | 1989 | 3,279,248 | | 1988 | 3,231,800 | | 1987 | 3,171,840 | | 1986 | 3,113,648 | | 1985 | 3,061,518 | | 1984 | 3,005,863.6 | | 1983 | 2,946,977.4 | | 1982 | 2,937,573.4 | | 1981 | 2,928,996 | | 1980 | 2,965,280 | | 1979 | 2,976,650 | | 1978 | 2,964,620 | | 1977 | 2,967,300 | | 1976 | 2,967,860 | | 1975 | 2,964,350 | | 1974 | 2,973,500 | | 1973 | 2,971,600 | | 1972 | 2,966,120 | | 1971 | 2,945,260 | | 1970 | 2,923,350 | | 1969 | 2,915,340 | | 1968 | 2,908,030 | | 1967 | 2,904,460 | | 1966 | 2,897,720 | | 1965 | 2,897,460 | | 1964 | 2,894,700 | | 1963 | 2,893,660 | | 1962 | 2,890,640 | | 1961 | 2,891,400 |
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