| Year | Value | | 2022 | 441,760 | | 2021 | 439,440 | | 2020 | 436,121 | | 2019 | 440,844 | | 2018 | 441,507 | | 2017 | 437,236 | | 2016 | 441,613 | | 2015 | 452,780 | | 2014 | 457,921 | | 2013 | 451,097 | | 2012 | 441,678 | | 2011 | 431,799 | | 2010 | 418,475 | | 2009 | 391,720 | | 2008 | 359,926 | | 2007 | 333,852 | | 2006 | 309,502 | | 2005 | 286,827 | | 2004 | 264,885 | | 2003 | 242,795 | | 2002 | 226,629 | | 2001 | 214,522 | | 2000 | 204,629 | | 1999 | 198,282 | | 1998 | 191,175 | | 1997 | 186,159 | | 1996 | 191,343 | | 1995 | 196,949 | | 1994 | 169,306 | | 1993 | 170,742 | | 1992 | 194,746 | | 1991 | 188,774 | | 1990 | 186,701 | | 1989 | 185,630 | | 1988 | 185,591 | | 1987 | 184,429 | | 1986 | 183,753 | | 1985 | 185,280 | | 1984 | 185,311 | | 1983 | 184,002 | | 1982 | 181,400 | | 1981 | 179,540 | | 1980 | 170,931 | | 1979 | 158,960 | | 1978 | 151,553 | | 1977 | 143,071 | | 1976 | 135,661 | | 1975 | 129,385 | | 1974 | 125,145 | | 1973 | 122,372 | | 1972 | 125,755 | | 1971 | 129,113 | | 1970 | 125,962 | | 1969 | 123,615 | | 1968 | 121,326 | | 1967 | 118,437 | | 1966 | 115,126 | | 1965 | 112,051 | | 1964 | 107,919 | | 1963 | 103,815 | | 1962 | 101,951 | | 1961 | 99,071 | | 1960 | 96,414 |
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