Year | Value | 2021 | 534,041.09 | 2020 | 364,856.074 | 2019 | 742,503 | 2018 | 772,925.545 | 2017 | 742,260 | 2016 | 743,673 | 2015 | 706,067 | 2014 | 628,104 | 2013 | 568,212.39662819 | 2012 | 476,115 | 2011 | 420,222 | 2010 | 369,174 | 2009 | 271,835 | 2008 | 215,275 | 2007 | 197,132 | 2006 | 177,088 | 2005 | 145,952 | 2004 | 121,815 | 2003 | 104,377 | 2002 | 105,996 | 2001 | 111,342 | 2000 | 119,945 | 1999 | 111,400 | 1998 | 103,900 | 1997 | 92,800 | 1996 | 84,900 | 1995 | 78,500 | 1994 | 75,100 | 1993 | 70,500 | 1992 | 58,600 | 1991 | 38,600 | 1990 | 44,200 | 1989 | 38,300 | 1988 | 36,800 | 1987 | 32,900 | 1986 | 31,700 | 1985 | 31,600 | 1984 | 28,400 | 1983 | 24,600 | 1982 | 24,000 | 1981 | 25,300 | 1980 | 18,900 | 1979 | 31,400 | 1978 | 30,400 | 1977 | 33,400 | 1976 | 32,000 | 1975 | 27,200 | 1974 | 30,600 |
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