| Year | Value | | 2022 | 256,597 | | 2021 | 259,769 | | 2020 | 264,651 | | 2019 | 271,252 | | 2018 | 278,521 | | 2017 | 285,293 | | 2016 | 290,864 | | 2015 | 294,446 | | 2014 | 296,246 | | 2013 | 297,537 | | 2012 | 299,035 | | 2011 | 299,922 | | 2010 | 300,281 | | 2009 | 301,843 | | 2008 | 305,173 | | 2007 | 310,567 | | 2006 | 319,818 | | 2005 | 332,538 | | 2004 | 345,925 | | 2003 | 358,709 | | 2002 | 369,840 | | 2001 | 378,717 | | 2000 | 385,938 | | 1999 | 392,413 | | 1998 | 398,823 | | 1997 | 404,815 | | 1996 | 410,271 | | 1995 | 415,449 | | 1994 | 419,970 | | 1993 | 423,680 | | 1992 | 423,917 | | 1991 | 420,007 | | 1990 | 414,701 | | 1989 | 409,137 | | 1988 | 403,679 | | 1987 | 399,593 | | 1986 | 397,938 | | 1985 | 396,593 | | 1984 | 393,724 | | 1983 | 389,391 | | 1982 | 384,276 | | 1981 | 381,307 | | 1980 | 379,086 | | 1979 | 374,516 | | 1978 | 368,960 | | 1977 | 363,267 | | 1976 | 357,766 | | 1975 | 352,265 | | 1974 | 347,476 | | 1973 | 343,896 | | 1972 | 340,661 | | 1971 | 338,290 | | 1970 | 337,175 | | 1969 | 335,549 | | 1968 | 331,479 | | 1967 | 324,983 | | 1966 | 316,029 | | 1965 | 305,399 | | 1964 | 294,753 | | 1963 | 284,748 | | 1962 | 275,409 | | 1961 | 267,004 | | 1960 | 259,598 |
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