| Year | Value | | 2021 | 9,647,100.71 | | 2020 | 8,538,140.8654 | | 2019 | 15,026,145.422 | | 2018 | 14,731,872.040031 | | 2017 | 13,873,144.138 | | 2016 | 13,043,884 | | 2015 | 12,319,764 | | 2014 | 11,650,792.072052 | | 2013 | 10,788,068.908309 | | 2012 | 10,082,251.456514 | | 2011 | 9,546,869.9057305 | | 2010 | 8,832,663.9931647 | | 2009 | 6,994,294 | | 2008 | 6,588,526 | | 2007 | 6,487,126 | | 2006 | 5,882,404 | | 2005 | 5,390,916 | | 2004 | 5,095,646 | | 2003 | 4,452,689 | | 2002 | 4,485,909 | | 2001 | 4,563,228 | | 2000 | 4,185,361 | | 1999 | 4,226,200 | | 1998 | 4,155,000 | | 1997 | 4,171,400 | | 1996 | 4,035,200 | | 1995 | 3,911,400 | | 1994 | 3,854,300 | | 1993 | 3,739,400 | | 1992 | 2,785,800 | | 1991 | 2,637,300 | | 1990 | 2,652,000 | | 1989 | 2,560,500 | | 1988 | 2,557,700 | | 1987 | 2,506,900 | | 1986 | 2,402,400 | | 1985 | 2,359,900 | | 1984 | 2,336,700 | | 1983 | 2,193,500 | | 1982 | 2,043,900 | | 1981 | 1,951,700 | | 1980 | 1,925,800 | | 1979 | 1,828,500 | | 1978 | 1,727,900 | | 1977 | 1,675,800 | | 1976 | 1,697,900 | | 1975 | 1,593,300 | | 1974 | 1,474,000 |
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