| Year | Value | | 2022 | 11,046,621 | | 2021 | 10,643,230 | | 2020 | 10,364,931 | | 2019 | 10,024,320 | | 2018 | 9,636,103 | | 2017 | 9,451,008 | | 2016 | 9,430,784 | | 2015 | 9,541,583 | | 2014 | 9,962,642 | | 2013 | 10,658,890 | | 2012 | 11,199,824 | | 2011 | 11,256,631 | | 2010 | 11,060,526 | | 2009 | 10,806,581 | | 2008 | 10,631,467 | | 2007 | 10,247,376 | | 2006 | 9,613,142 | | 2005 | 9,190,476 | | 2004 | 8,942,531 | | 2003 | 8,707,194 | | 2002 | 8,483,717 | | 2001 | 8,265,950 | | 2000 | 8,055,934 | | 1999 | 7,852,813 | | 1998 | 7,653,005 | | 1997 | 7,455,588 | | 1996 | 7,259,001 | | 1995 | 7,062,441 | | 1994 | 6,867,800 | | 1993 | 6,675,641 | | 1992 | 6,486,359 | | 1991 | 6,300,266 | | 1990 | 6,114,715 | | 1989 | 5,928,722 | | 1988 | 5,742,199 | | 1987 | 5,555,657 | | 1986 | 5,370,881 | | 1985 | 5,189,644 | | 1984 | 5,012,760 | | 1983 | 4,840,752 | | 1982 | 4,677,820 | | 1981 | 4,522,752 | | 1980 | 4,370,703 | | 1979 | 4,222,403 | | 1978 | 4,078,224 | | 1977 | 3,939,305 | | 1976 | 3,805,780 | | 1975 | 3,676,794 | | 1974 | 3,552,378 | | 1973 | 3,431,981 | | 1972 | 3,315,173 | | 1971 | 3,201,670 | | 1970 | 3,093,137 | | 1969 | 2,989,970 | | 1968 | 2,891,269 | | 1967 | 2,796,943 | | 1966 | 2,706,758 | | 1965 | 2,620,673 | | 1964 | 2,538,539 | | 1963 | 2,460,275 | | 1962 | 2,385,593 | | 1961 | 2,314,289 | | 1960 | 2,244,590 |
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