| Year | Value | | 2022 | 17,597,511 | | 2021 | 17,065,581 | | 2020 | 16,537,016 | | 2019 | 15,981,300 | | 2018 | 15,411,094 | | 2017 | 14,864,221 | | 2016 | 14,292,847 | | 2015 | 13,763,906 | | 2014 | 13,309,235 | | 2013 | 12,852,485 | | 2012 | 12,440,326 | | 2011 | 12,216,837 | | 2010 | 12,026,649 | | 2009 | 11,730,037 | | 2008 | 11,444,870 | | 2007 | 11,118,092 | | 2006 | 10,784,973 | | 2005 | 10,467,292 | | 2004 | 10,117,354 | | 2003 | 9,758,281 | | 2002 | 9,411,103 | | 2001 | 9,070,747 | | 2000 | 8,721,465 | | 1999 | 8,384,479 | | 1998 | 8,056,862 | | 1997 | 7,734,313 | | 1996 | 7,472,450 | | 1995 | 7,210,930 | | 1994 | 6,959,828 | | 1993 | 6,620,729 | | 1992 | 6,428,141 | | 1991 | 6,732,702 | | 1990 | 6,999,096 | | 1989 | 7,035,378 | | 1988 | 7,160,461 | | 1987 | 7,158,004 | | 1986 | 6,908,579 | | 1985 | 6,630,637 | | 1984 | 6,369,020 | | 1983 | 6,142,513 | | 1982 | 5,951,805 | | 1981 | 5,934,938 | | 1980 | 5,892,224 | | 1979 | 5,408,813 | | 1978 | 4,777,703 | | 1977 | 4,449,505 | | 1976 | 4,333,779 | | 1975 | 4,228,289 | | 1974 | 4,125,823 | | 1973 | 4,022,336 | | 1972 | 3,918,220 | | 1971 | 3,818,389 | | 1970 | 3,720,977 | | 1969 | 3,625,274 | | 1968 | 3,532,420 | | 1967 | 3,441,799 | | 1966 | 3,353,665 | | 1965 | 3,267,593 | | 1964 | 3,183,590 | | 1963 | 3,102,170 | | 1962 | 3,022,827 | | 1961 | 2,945,662 | | 1960 | 2,870,732 |
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