| Year | Value | | 2022 | 324,394 | | 2021 | 317,924 | | 2020 | 313,207 | | 2019 | 308,156 | | 2018 | 302,297 | | 2017 | 296,716 | | 2016 | 289,781 | | 2015 | 283,954 | | 2014 | 277,710 | | 2013 | 271,532 | | 2012 | 265,765 | | 2011 | 260,020 | | 2010 | 254,780 | | 2009 | 250,499 | | 2008 | 246,266 | | 2007 | 242,111 | | 2006 | 238,501 | | 2005 | 234,862 | | 2004 | 231,519 | | 2003 | 228,646 | | 2002 | 226,149 | | 2001 | 223,861 | | 2000 | 221,082 | | 1999 | 218,070 | | 1998 | 215,434 | | 1997 | 213,044 | | 1996 | 210,514 | | 1995 | 207,691 | | 1994 | 204,729 | | 1993 | 201,950 | | 1992 | 199,362 | | 1991 | 196,963 | | 1990 | 194,761 | | 1989 | 192,796 | | 1988 | 191,292 | | 1987 | 190,162 | | 1986 | 189,093 | | 1985 | 188,306 | | 1984 | 187,982 | | 1983 | 187,772 | | 1982 | 187,497 | | 1981 | 187,068 | | 1980 | 186,293 | | 1979 | 185,385 | | 1978 | 184,728 | | 1977 | 184,202 | | 1976 | 183,679 | | 1975 | 182,609 | | 1974 | 180,488 | | 1973 | 177,964 | | 1972 | 176,092 | | 1971 | 174,398 | | 1970 | 172,862 | | 1969 | 171,849 | | 1968 | 170,914 | | 1967 | 170,382 | | 1966 | 169,693 | | 1965 | 168,318 | | 1964 | 166,289 | | 1963 | 164,361 | | 1962 | 162,561 | | 1961 | 160,461 | | 1960 | 158,884 |
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