Year | Value | 2022 | 557,575 | 2021 | 551,799 | 2020 | 543,131 | 2019 | 534,893 | 2018 | 528,882 | 2017 | 525,450 | 2016 | 525,081 | 2015 | 526,084 | 2014 | 525,016 | 2013 | 521,588 | 2012 | 517,574 | 2011 | 512,432 | 2010 | 505,342 | 2009 | 497,495 | 2008 | 489,640 | 2007 | 482,311 | 2006 | 477,684 | 2005 | 476,653 | 2004 | 476,896 | 2003 | 477,588 | 2002 | 478,276 | 2001 | 476,624 | 2000 | 473,839 | 1999 | 475,103 | 1998 | 482,506 | 1997 | 497,567 | 1996 | 520,788 | 1995 | 549,011 | 1994 | 578,652 | 1993 | 601,932 | 1992 | 614,659 | 1991 | 619,429 | 1990 | 619,554 | 1989 | 618,400 | 1988 | 619,487 | 1987 | 621,899 | 1986 | 623,649 | 1985 | 622,623 | 1984 | 618,000 | 1983 | 611,815 | 1982 | 604,933 | 1981 | 596,898 | 1980 | 588,310 | 1979 | 579,365 | 1978 | 570,962 | 1977 | 565,225 | 1976 | 560,300 | 1975 | 554,635 | 1974 | 551,328 | 1973 | 553,364 | 1972 | 561,668 | 1971 | 576,816 | 1970 | 577,039 | 1969 | 560,813 | 1968 | 542,407 | 1967 | 512,714 | 1966 | 470,650 | 1965 | 443,328 | 1964 | 432,069 | 1963 | 418,859 | 1962 | 408,815 | 1961 | 402,265 | 1960 | 396,207 |
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