Year | Value | 2021 | 219,247 | 2020 | 144,771 | 2019 | 317,209 | 2018 | 267,295 | 2017 | 270,924 | 2016 | 256,635 | 2015 | 236,468 | 2014 | 232,908 | 2013 | 216,636 | 2012 | 208,986 | 2011 | 193,536 | 2010 | 177,608 | 2009 | 156,500 | 2008 | 148,335 | 2007 | 150,521 | 2006 | 131,528 | 2005 | 116,280 | 2004 | 113,329 | 2003 | 108,322 | 2002 | 108,598 | 2001 | 107,984 | 2000 | 108,981 | 1999 | 106,900 | 1998 | 101,100 | 1997 | 100,300 | 1996 | 100,700 | 1995 | 98,100 | 1994 | 102,500 | 1993 | 100,000 | 1992 | 95,100 | 1991 | 79,000 | 1990 | 92,700 | 1989 | 89,900 | 1988 | 92,700 | 1987 | 91,000 | 1986 | 95,500 | 1985 | 100,500 | 1984 | 103,700 | 1983 | 101,400 | 1982 | 99,000 | 1981 | 100,400 | 1980 | 94,400 | 1979 | 84,100 | 1978 | 74,500 | 1977 | 64,800 | 1976 | 47,700 | 1975 | 35,500 | 1974 | 29,500 | 1973 | 25,000 | 1972 | 26,000 | 1971 | 26,400 | 1970 | 25,200 |
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