| Year | Value | | 2022 | 13,330,919 | | 2021 | 13,140,099 | | 2020 | 12,948,486 | | 2019 | 12,749,807 | | 2018 | 12,548,396 | | 2017 | 12,343,003 | | 2016 | 12,135,625 | | 2015 | 11,929,568 | | 2014 | 11,724,514 | | 2013 | 11,550,777 | | 2012 | 11,407,712 | | 2011 | 11,266,407 | | 2010 | 11,123,926 | | 2009 | 10,977,824 | | 2008 | 10,832,602 | | 2007 | 10,687,487 | | 2006 | 10,540,282 | | 2005 | 10,389,228 | | 2004 | 10,233,634 | | 2003 | 10,072,928 | | 2002 | 9,905,989 | | 2001 | 9,731,963 | | 2000 | 9,549,772 | | 1999 | 9,359,495 | | 1998 | 9,143,976 | | 1997 | 8,900,084 | | 1996 | 8,651,518 | | 1995 | 8,406,810 | | 1994 | 8,166,122 | | 1993 | 7,928,480 | | 1992 | 7,691,691 | | 1991 | 7,456,690 | | 1990 | 7,224,338 | | 1989 | 6,995,146 | | 1988 | 6,779,637 | | 1987 | 6,574,473 | | 1986 | 6,378,760 | | 1985 | 6,186,694 | | 1984 | 5,994,809 | | 1983 | 5,803,509 | | 1982 | 5,614,050 | | 1981 | 5,427,828 | | 1980 | 5,245,600 | | 1979 | 5,068,578 | | 1978 | 4,897,719 | | 1977 | 4,821,596 | | 1976 | 4,743,175 | | 1975 | 4,645,011 | | 1974 | 4,497,735 | | 1973 | 4,348,061 | | 1972 | 4,202,793 | | 1971 | 4,064,170 | | 1970 | 3,934,574 | | 1969 | 3,815,028 | | 1968 | 3,703,798 | | 1967 | 3,597,544 | | 1966 | 3,493,774 | | 1965 | 3,392,132 | | 1964 | 3,327,151 | | 1963 | 3,259,698 | | 1962 | 3,190,233 | | 1961 | 3,120,577 | | 1960 | 3,053,007 |
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