| Year | Value | | 2022 | 492,427 | | 2021 | 503,906 | | 2020 | 513,953 | | 2019 | 521,770 | | 2018 | 526,495 | | 2017 | 527,242 | | 2016 | 523,517 | | 2015 | 514,584 | | 2014 | 500,675 | | 2013 | 484,212 | | 2012 | 467,067 | | 2011 | 451,568 | | 2010 | 438,990 | | 2009 | 428,889 | | 2008 | 420,178 | | 2007 | 411,531 | | 2006 | 403,147 | | 2005 | 395,744 | | 2004 | 391,550 | | 2003 | 391,992 | | 2002 | 396,755 | | 2001 | 405,558 | | 2000 | 417,595 | | 1999 | 432,740 | | 1998 | 449,304 | | 1997 | 465,225 | | 1996 | 479,944 | | 1995 | 492,826 | | 1994 | 502,336 | | 1993 | 510,080 | | 1992 | 518,724 | | 1991 | 528,096 | | 1990 | 536,918 | | 1989 | 544,330 | | 1988 | 548,382 | | 1987 | 547,356 | | 1986 | 542,177 | | 1985 | 533,785 | | 1984 | 524,457 | | 1983 | 516,688 | | 1982 | 511,315 | | 1981 | 507,401 | | 1980 | 503,997 | | 1979 | 499,843 | | 1978 | 493,515 | | 1977 | 484,594 | | 1976 | 473,916 | | 1975 | 463,668 | | 1974 | 455,093 | | 1973 | 448,411 | | 1972 | 443,364 | | 1971 | 439,207 | | 1970 | 434,894 | | 1969 | 429,437 | | 1968 | 422,741 | | 1967 | 415,290 | | 1966 | 407,390 | | 1965 | 399,134 | | 1964 | 391,437 | | 1963 | 384,559 | | 1962 | 377,923 | | 1961 | 371,590 | | 1960 | 365,087 |
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