Year | Value | 2021 | 56,482 | 2020 | 64,267 | 2019 | 215,014 | 2018 | 208,787 | 2017 | 203,615 | 2016 | 207,203 | 2015 | 181,563 | 2014 | 183,398.55760026 | 2013 | 165,239.07 | 2012 | 157,939.31776526 | 2011 | 144,696.87545537 | 2010 | 131,721.91555933 | 2009 | 83,772 | 2008 | 91,387 | 2007 | 87,564 | 2006 | 84,747 | 2005 | 77,119 | 2004 | 76,253 | 2003 | 64,117 | 2002 | 72,444 | 2001 | 72,431 | 2000 | 71,042 | 1999 | 68,400 | 1998 | 61,700 | 1997 | 60,700 | 1996 | 57,200 | 1995 | 51,600 | 1994 | 46,100 | 1993 | 43,100 | 1992 | 39,100 | 1991 | 35,000 | 1990 | 30,500 | 1989 | 32,000 | 1988 | 34,900 | 1987 | 32,900 | 1986 | 31,600 | 1985 | 31,100 | 1984 | 29,800 | 1983 | 34,600 | 1982 | 29,900 | 1981 | 29,900 | 1980 | 32,500 | 1979 | 32,800 | 1978 | 30,300 | 1977 | 27,500 | 1976 | 25,700 | 1975 | 23,800 | 1974 | 22,800 | 1973 | 21,300 | 1972 | 30,300 | 1971 | 31,300 | 1970 | 27,700 |
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