Year | Value | 2021 | 445,488 | 2020 | 322,333 | 2019 | 605,632 | 2018 | 583,408 | 2017 | 567,921 | 2016 | 555,984 | 2015 | 508,614 | 2014 | 457,921.907 | 2013 | 435,792.09 | 2012 | 415,279.82298919 | 2011 | 386,063.99410953 | 2010 | 445,796.03302316 | 2009 | 222,356 | 2008 | 266,244 | 2007 | 309,633 | 2006 | 317,856 | 2005 | 331,225 | 2004 | 330,441 | 2003 | 287,017 | 2002 | 278,456 | 2001 | 292,208 | 2000 | 290,412 | 1999 | 328,300 | 1998 | 292,100 | 1997 | 264,100 | 1996 | 222,700 | 1995 | 225,100 | 1994 | 272,100 | 1993 | 246,600 | 1992 | 228,400 | 1991 | 189,300 | 1990 | 177,300 | 1989 | 152,200 | 1988 | 141,400 | 1987 | 189,000 | 1986 | 187,100 | 1985 | 204,600 | 1984 | 200,700 | 1983 | 202,300 | 1982 | 144,800 | 1981 | 151,800 | 1980 | 177,100 | 1979 | 129,300 | 1978 | 115,200 | 1977 | 111,900 | 1976 | 115,300 | 1975 | 112,100 | 1974 | 101,600 | 1973 | 91,200 | 1972 | 64,800 | 1971 | 49,600 | 1970 | 56,500 |
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