Year | Value | 2022 | 578,255 | 2021 | 577,276 | 2020 | 577,955 | 2019 | 574,980 | 2018 | 567,878 | 2017 | 560,186 | 2016 | 551,144 | 2015 | 540,610 | 2014 | 531,009 | 2013 | 522,481 | 2012 | 513,891 | 2011 | 507,169 | 2010 | 503,633 | 2009 | 501,132 | 2008 | 499,400 | 2007 | 498,982 | 2006 | 498,307 | 2005 | 497,593 | 2004 | 500,636 | 2003 | 509,569 | 2002 | 525,781 | 2001 | 549,709 | 2000 | 578,765 | 1999 | 610,032 | 1998 | 635,793 | 1997 | 651,540 | 1996 | 659,480 | 1995 | 662,690 | 1994 | 663,705 | 1993 | 665,479 | 1992 | 667,443 | 1991 | 667,481 | 1990 | 663,688 | 1989 | 655,900 | 1988 | 646,525 | 1987 | 636,665 | 1986 | 626,701 | 1985 | 617,456 | 1984 | 609,033 | 1983 | 601,813 | 1982 | 597,321 | 1981 | 593,458 | 1980 | 589,241 | 1979 | 587,475 | 1978 | 590,813 | 1977 | 600,556 | 1976 | 617,498 | 1975 | 618,005 | 1974 | 600,273 | 1973 | 580,396 | 1972 | 548,956 | 1971 | 504,864 | 1970 | 475,545 | 1969 | 462,145 | 1968 | 446,220 | 1967 | 433,651 | 1966 | 424,207 | 1965 | 414,624 | 1964 | 404,964 | 1963 | 396,929 | 1962 | 392,500 | 1961 | 390,905 | 1960 | 390,888 |
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