Year | Value | 2021 | 73,673.104 | 2020 | 57,072.125 | 2019 | 137,206.817 | 2018 | 140,674 | 2017 | 145,540 | 2016 | 147,324 | 2015 | 141,116 | 2014 | 132,976.52964928 | 2013 | 130,230 | 2012 | 132,099.34254194 | 2011 | 131,577 | 2010 | 127,677.53220986 | 2009 | 249,997 | 2008 | 179,019 | 2007 | 173,818 | 2006 | 158,016 | 2005 | 151,939 | 2004 | 154,218 | 2003 | 132,779 | 2002 | 133,682 | 2001 | 178,331 | 2000 | 225,906 | 1999 | 233,300 | 1998 | 213,000 | 1997 | 182,700 | 1996 | 164,700 | 1995 | 141,200 | 1994 | 118,700 | 1993 | 109,100 | 1992 | 77,100 | 1991 | 70,000 | 1990 | 66,500 | 1989 | 59,700 | 1988 | 51,200 | 1987 | 45,900 | 1986 | 45,300 | 1985 | 43,200 | 1984 | 40,400 | 1983 | 39,100 | 1982 | 40,400 | 1981 | 43,000 | 1980 | 47,800 | 1979 | 48,000 | 1978 | 46,000 | 1977 | 42,800 | 1976 | 39,900 | 1975 | 36,100 | 1974 | 37,300 | 1973 | 40,400 | 1972 | 41,000 | 1971 | 40,700 | 1970 | 40,800 |
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