| Year | Value | | 2022 | 16,793,302 | | 2021 | 16,339,849 | | 2020 | 15,884,940 | | 2019 | 15,433,808 | | 2018 | 14,996,993 | | 2017 | 14,567,003 | | 2016 | 14,135,272 | | 2015 | 13,714,918 | | 2014 | 13,315,954 | | 2013 | 12,925,693 | | 2012 | 12,545,887 | | 2011 | 12,182,882 | | 2010 | 11,837,502 | | 2009 | 11,513,202 | | 2008 | 11,209,337 | | 2007 | 10,919,618 | | 2006 | 10,641,439 | | 2005 | 10,372,470 | | 2004 | 10,107,859 | | 2003 | 9,847,572 | | 2002 | 9,594,055 | | 2001 | 9,348,513 | | 2000 | 9,112,588 | | 1999 | 8,886,269 | | 1998 | 8,668,097 | | 1997 | 8,456,940 | | 1996 | 8,229,401 | | 1995 | 7,984,592 | | 1994 | 7,638,748 | | 1993 | 7,280,041 | | 1992 | 7,083,124 | | 1991 | 6,954,284 | | 1990 | 6,824,389 | | 1989 | 6,715,923 | | 1988 | 6,650,904 | | 1987 | 6,651,185 | | 1986 | 6,613,641 | | 1985 | 6,486,739 | | 1984 | 6,347,443 | | 1983 | 6,208,984 | | 1982 | 6,076,552 | | 1981 | 5,943,912 | | 1980 | 5,829,757 | | 1979 | 5,679,927 | | 1978 | 5,471,824 | | 1977 | 5,267,694 | | 1976 | 5,083,236 | | 1975 | 4,915,963 | | 1974 | 4,756,962 | | 1973 | 4,607,678 | | 1972 | 4,467,828 | | 1971 | 4,343,770 | | 1970 | 4,236,775 | | 1969 | 4,141,138 | | 1968 | 4,052,725 | | 1967 | 3,967,934 | | 1966 | 3,886,824 | | 1965 | 3,808,264 | | 1964 | 3,732,745 | | 1963 | 3,661,919 | | 1962 | 3,594,082 | | 1961 | 3,529,910 | | 1960 | 3,468,579 |
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