Year | Value | 2022 | 12,035,868 | 2021 | 11,827,375 | 2020 | 11,625,028 | 2019 | 11,369,451 | 2018 | 11,229,484 | 2017 | 11,164,374 | 2016 | 11,241,803 | 2015 | 11,447,666 | 2014 | 11,656,504 | 2013 | 11,801,508 | 2012 | 11,887,694 | 2011 | 11,884,723 | 2010 | 11,870,880 | 2009 | 11,963,592 | 2008 | 12,176,229 | 2007 | 12,411,924 | 2006 | 12,647,050 | 2005 | 12,836,461 | 2004 | 12,911,277 | 2003 | 12,892,904 | 2002 | 12,858,193 | 2001 | 12,779,278 | 2000 | 12,641,561 | 1999 | 12,468,384 | 1998 | 12,263,984 | 1997 | 11,985,834 | 1996 | 11,822,661 | 1995 | 11,554,642 | 1994 | 11,008,904 | 1993 | 10,595,365 | 1992 | 10,433,737 | 1991 | 10,147,488 | 1990 | 9,744,420 | 1989 | 9,502,220 | 1988 | 9,224,107 | 1987 | 8,786,749 | 1986 | 8,246,551 | 1985 | 7,887,328 | 1984 | 7,676,949 | 1983 | 7,396,587 | 1982 | 7,092,091 | 1981 | 6,888,458 | 1980 | 6,737,087 | 1979 | 6,582,906 | 1978 | 6,468,209 | 1977 | 6,407,975 | 1976 | 6,363,075 | 1975 | 6,348,392 | 1974 | 6,444,963 | 1973 | 6,520,949 | 1972 | 6,552,087 | 1971 | 6,666,845 | 1970 | 6,761,890 | 1969 | 6,758,793 | 1968 | 6,904,773 | 1967 | 7,063,223 | 1966 | 6,974,990 | 1965 | 6,936,238 | 1964 | 7,016,853 | 1963 | 6,864,962 | 1962 | 6,612,298 | 1961 | 6,546,295 | 1960 | 6,457,409 |
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