Year | Value | 2022 | 517,403 | 2021 | 523,865 | 2020 | 531,729 | 2019 | 537,948 | 2018 | 539,053 | 2017 | 536,300 | 2016 | 530,503 | 2015 | 522,592 | 2014 | 516,176 | 2013 | 512,970 | 2012 | 512,554 | 2011 | 514,900 | 2010 | 517,962 | 2009 | 517,974 | 2008 | 514,780 | 2007 | 511,556 | 2006 | 507,840 | 2005 | 502,197 | 2004 | 496,189 | 2003 | 490,102 | 2002 | 482,999 | 2001 | 477,322 | 2000 | 474,837 | 1999 | 473,667 | 1998 | 473,297 | 1997 | 473,638 | 1996 | 472,992 | 1995 | 471,964 | 1994 | 474,576 | 1993 | 482,644 | 1992 | 497,759 | 1991 | 520,883 | 1990 | 549,302 | 1989 | 580,181 | 1988 | 605,859 | 1987 | 621,452 | 1986 | 628,987 | 1985 | 631,863 | 1984 | 633,228 | 1983 | 636,545 | 1982 | 640,752 | 1981 | 643,234 | 1980 | 641,121 | 1979 | 634,008 | 1978 | 625,561 | 1977 | 617,193 | 1976 | 608,474 | 1975 | 598,935 | 1974 | 589,578 | 1973 | 581,882 | 1972 | 577,055 | 1971 | 572,972 | 1970 | 569,235 | 1969 | 568,589 | 1968 | 573,087 | 1967 | 584,108 | 1966 | 602,317 | 1965 | 604,641 | 1964 | 588,829 | 1963 | 570,364 | 1962 | 539,819 | 1961 | 496,024 | 1960 | 467,610 |
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