Year | Value | 2022 | 23,681,161 | 2021 | 23,553,869 | 2020 | 23,383,797 | 2019 | 23,192,044 | 2018 | 22,976,519 | 2017 | 22,755,501 | 2016 | 22,534,064 | 2015 | 22,293,802 | 2014 | 22,026,497 | 2013 | 21,729,063 | 2012 | 21,397,628 | 2011 | 21,048,449 | 2010 | 20,696,327 | 2009 | 20,361,543 | 2008 | 20,034,539 | 2007 | 19,729,793 | 2006 | 19,436,964 | 2005 | 19,150,230 | 2004 | 18,861,320 | 2003 | 18,566,719 | 2002 | 18,283,262 | 2001 | 18,026,607 | 2000 | 17,797,719 | 1999 | 17,595,464 | 1998 | 17,396,587 | 1997 | 17,163,870 | 1996 | 16,881,907 | 1995 | 16,547,969 | 1994 | 16,162,610 | 1993 | 15,738,138 | 1992 | 15,294,694 | 1991 | 14,847,627 | 1990 | 14,407,309 | 1989 | 13,985,627 | 1988 | 13,576,329 | 1987 | 13,168,613 | 1986 | 12,768,546 | 1985 | 12,374,923 | 1984 | 11,981,391 | 1983 | 11,572,592 | 1982 | 11,147,992 | 1981 | 10,723,046 | 1980 | 10,302,068 | 1979 | 9,898,644 | 1978 | 9,536,924 | 1977 | 9,222,334 | 1976 | 8,948,037 | 1975 | 8,702,504 | 1974 | 8,469,239 | 1973 | 8,240,974 | 1972 | 8,014,954 | 1971 | 7,796,163 | 1970 | 7,606,346 | 1969 | 7,449,502 | 1968 | 7,315,734 | 1967 | 7,202,173 | 1966 | 7,097,495 | 1965 | 6,993,131 | 1964 | 6,887,205 | 1963 | 6,775,925 | 1962 | 6,652,797 | 1961 | 6,515,652 | 1960 | 6,369,379 |
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