Year | Value | 2021 | 71,789 | 2020 | 32,578 | 2019 | 110,042 | 2018 | 111,583 | 2017 | 112,742 | 2016 | 143,126 | 2015 | 137,955 | 2014 | 132,689.72477487 | 2013 | 135,428 | 2012 | 82,753 | 2011 | 79,391 | 2010 | 73,316.750395115 | 2009 | 66,236 | 2008 | 46,292 | 2007 | 40,645 | 2006 | 33,003 | 2005 | 30,392 | 2004 | 27,434 | 2003 | 25,702 | 2002 | 21,883 | 2001 | 24,867 | 2000 | 25,225 | 1999 | 21,200 | 1998 | 21,700 | 1997 | 17,800 | 1996 | 16,600 | 1995 | 16,400 | 1994 | 10,700 | 1993 | 9,500 | 1992 | 7,500 | 1991 | 5,500 | 1990 | 5,400 | 1989 | 6,900 | 1988 | 7,200 | 1987 | 7,000 | 1986 | 7,000 | 1985 | 6,900 | 1984 | 6,800 | 1983 | 6,800 | 1982 | 9,700 | 1981 | 6,500 | 1980 | 8,700 | 1979 | 11,300 | 1978 | 10,600 | 1977 | 11,700 | 1976 | 10,900 | 1975 | 9,300 | 1974 | 11,500 | 1973 | 11,500 | 1972 | 16,700 | 1971 | 16,400 | 1970 | 16,000 |
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