Year | Value | 2021 | 157,785.876 | 2020 | 132,936.795 | 2019 | 186,006 | 2018 | 207,096 | 2017 | 225,399.088 | 2016 | 159,754 | 2015 | 133,663 | 2014 | 162,563.37417583 | 2013 | 161,029 | 2012 | 153,142.82222371 | 2011 | 161,191.67760432 | 2010 | 158,014.18345095 | 2009 | 133,932 | 2008 | 122,226 | 2007 | 137,645 | 2006 | 136,075 | 2005 | 121,235 | 2004 | 109,706 | 2003 | 138,537 | 2002 | 92,621 | 2001 | 141,396 | 2000 | 82,610 | 1999 | 75,900 | 1998 | 79,600 | 1997 | 83,400 | 1996 | 63,300 | 1995 | 48,600 | 1994 | 46,500 | 1993 | 41,600 | 1992 | 37,700 | 1991 | 41,500 | 1990 | 39,900 | 1989 | 36,500 | 1988 | 31,000 | 1987 | 34,500 | 1986 | 35,200 | 1985 | 27,200 | 1984 | 36,900 | 1983 | 30,900 | 1982 | 24,900 | 1981 | 11,600 | 1980 | 18,600 | 1979 | 23,000 | 1978 | 41,100 | 1977 | 41,900 | 1976 | 38,300 | 1975 | 32,000 | 1974 | 25,100 | 1973 | 22,200 | 1972 | 19,300 | 1971 | 18,800 | 1970 | 17,100 |
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