Year | Value | 2021 | 60,781 | 2020 | 48,381 | 2019 | 131,419 | 2018 | 123,903 | 2017 | 106,424 | 2016 | 84,075 | 2015 | 68,326 | 2014 | 77,094 | 2013 | 83,336 | 2012 | 81,194 | 2011 | 82,052 | 2010 | 82,630 | 2009 | 83,053 | 2008 | 90,031 | 2007 | 89,289 | 2006 | 83,451 | 2005 | 78,992 | 2004 | 77,690 | 2003 | 73,137 | 2002 | 69,842 | 2001 | 71,799 | 2000 | 52,371 | 1999 | 43,800 | 1998 | 38,400 | 1997 | 38,300 | 1996 | 35,900 | 1995 | 32,100 | 1994 | 30,500 | 1993 | 27,600 | 1992 | 22,400 | 1991 | 19,600 | 1990 | 28,600 | 1989 | 31,500 | 1988 | 28,900 | 1987 | 30,200 | 1986 | 30,700 | 1985 | 28,400 | 1984 | 28,800 | 1983 | 25,800 | 1982 | 16,400 | 1981 | 34,100 | 1980 | 42,700 | 1979 | 42,700 | 1978 | 41,500 | 1977 | 41,000 | 1976 | 38,200 | 1975 | 36,900 | 1974 | 30,800 | 1973 | 35,200 | 1972 | 32,100 | 1971 | 29,400 | 1970 | 29,500 |
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