Year | Value | 2021 | 275,557 | 2020 | 235,446.363 | 2019 | 566,402 | 2018 | 549,291 | 2017 | 484,988 | 2016 | 436,849 | 2015 | 420,199 | 2014 | 414,473.868 | 2013 | 407,489 | 2012 | 409,115.83165113 | 2011 | 458,432.21238981 | 2010 | 459,987.60546165 | 2009 | 405,656 | 2008 | 415,443 | 2007 | 397,337 | 2006 | 363,872 | 2005 | 347,743 | 2004 | 314,685 | 2003 | 268,637 | 2002 | 235,443 | 2001 | 237,439 | 2000 | 220,821 | 1999 | 205,200 | 1998 | 188,200 | 1997 | 183,500 | 1996 | 167,200 | 1995 | 158,500 | 1994 | 151,200 | 1993 | 143,800 | 1992 | 116,900 | 1991 | 93,800 | 1990 | 129,000 | 1989 | 133,200 | 1988 | 130,000 | 1987 | 133,000 | 1986 | 133,300 | 1985 | 127,300 | 1984 | 127,900 | 1983 | 118,200 | 1982 | 103,300 | 1981 | 119,000 | 1980 | 142,600 | 1979 | 150,900 | 1978 | 142,900 | 1977 | 143,100 | 1976 | 140,700 | 1975 | 120,200 | 1974 | 110,900 | 1973 | 105,300 | 1972 | 100,300 | 1971 | 88,900 | 1970 | 72,700 |
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