| Year | Value | | 2022 | 691,676 | | 2021 | 686,549 | | 2020 | 683,115 | | 2019 | 678,959 | | 2018 | 673,494 | | 2017 | 667,787 | | 2016 | 661,802 | | 2015 | 655,408 | | 2014 | 648,712 | | 2013 | 642,262 | | 2012 | 636,004 | | 2011 | 629,651 | | 2010 | 623,153 | | 2009 | 616,589 | | 2008 | 606,484 | | 2007 | 600,185 | | 2006 | 593,922 | | 2005 | 587,811 | | 2004 | 581,761 | | 2003 | 575,782 | | 2002 | 569,619 | | 2001 | 562,318 | | 2000 | 553,243 | | 1999 | 542,736 | | 1998 | 532,971 | | 1997 | 524,715 | | 1996 | 515,524 | | 1995 | 506,480 | | 1994 | 498,490 | | 1993 | 491,062 | | 1992 | 483,355 | | 1991 | 471,986 | | 1990 | 449,271 | | 1989 | 440,279 | | 1988 | 437,537 | | 1987 | 434,978 | | 1986 | 432,651 | | 1985 | 430,581 | | 1984 | 427,587 | | 1983 | 426,592 | | 1982 | 431,841 | | 1981 | 437,534 | | 1980 | 442,751 | | 1979 | 446,180 | | 1978 | 448,778 | | 1977 | 453,431 | | 1976 | 457,418 | | 1975 | 461,484 | | 1974 | 465,216 | | 1973 | 465,705 | | 1972 | 461,151 | | 1971 | 466,826 | | 1970 | 470,041 | | 1969 | 472,346 | | 1968 | 477,855 | | 1967 | 485,865 | | 1966 | 482,947 | | 1965 | 488,508 | | 1964 | 489,258 | | 1963 | 487,647 | | 1962 | 487,171 | | 1961 | 481,028 | | 1960 | 489,438 |
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