| Year | Value | | 2021 | 24,648,913.701 | | 2020 | 19,813,665.794 | | 2019 | 46,055,825.799245 | | 2018 | 47,888,996.115182 | | 2017 | 41,913,074.630311 | | 2016 | 35,795,999 | | 2015 | 34,106,935 | | 2014 | 33,574,548.644047 | | 2013 | 31,425,693.703497 | | 2012 | 29,556,425.345932 | | 2011 | 28,627,751.718811 | | 2010 | 23,692,649.346418 | | 2009 | 16,713,013 | | 2008 | 16,581,030 | | 2007 | 16,510,375 | | 2006 | 15,697,949 | | 2005 | 14,861,220 | | 2004 | 13,933,948 | | 2003 | 11,546,816 | | 2002 | 11,261,273 | | 2001 | 10,722,979 | | 2000 | 11,473,357 | | 1999 | 11,088,600 | | 1998 | 11,324,100 | | 1997 | 10,919,800 | | 1996 | 11,080,100 | | 1995 | 10,564,800 | | 1994 | 10,692,700 | | 1993 | 10,821,500 | | 1992 | 9,778,000 | | 1991 | 9,468,300 | | 1990 | 10,424,200 | | 1989 | 9,677,200 | | 1988 | 10,093,100 | | 1987 | 9,031,100 | | 1986 | 8,956,300 | | 1985 | 8,887,800 | | 1984 | 9,327,000 | | 1983 | 8,906,200 | | 1982 | 8,694,300 | | 1981 | 8,360,700 | | 1980 | 7,695,800 | | 1979 | 7,180,200 | | 1978 | 6,382,700 | | 1977 | 6,067,400 | | 1976 | 6,097,300 | | 1975 | 5,260,700 | | 1974 | 4,985,300 | | 1973 | 4,675,100 | | 1972 | 4,064,000 | | 1971 | 3,919,500 | | 1970 | 3,620,300 |
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