Year | Value | 2022 | 12,531,307 | 2021 | 12,430,041 | 2020 | 12,446,571 | 2019 | 12,441,104 | 2018 | 12,486,729 | 2017 | 12,580,343 | 2016 | 12,741,952 | 2015 | 12,967,033 | 2014 | 13,223,281 | 2013 | 13,461,738 | 2012 | 13,645,544 | 2011 | 13,778,400 | 2010 | 13,920,636 | 2009 | 14,002,868 | 2008 | 14,058,519 | 2007 | 14,115,444 | 2006 | 14,221,929 | 2005 | 14,374,890 | 2004 | 14,529,858 | 2003 | 14,658,089 | 2002 | 14,761,247 | 2001 | 14,862,756 | 2000 | 14,958,011 | 1999 | 15,072,320 | 1998 | 15,196,117 | 1997 | 15,334,563 | 1996 | 15,511,056 | 1995 | 15,699,613 | 1994 | 15,883,603 | 1993 | 16,091,025 | 1992 | 16,301,472 | 1991 | 16,430,407 | 1990 | 16,488,331 | 1989 | 16,556,142 | 1988 | 16,595,027 | 1987 | 16,550,368 | 1986 | 16,478,105 | 1985 | 16,410,209 | 1984 | 16,291,044 | 1983 | 16,143,026 | 1982 | 16,037,439 | 1981 | 15,968,962 | 1980 | 15,885,225 | 1979 | 15,794,829 | 1978 | 15,706,778 | 1977 | 15,617,150 | 1976 | 15,525,807 | 1975 | 15,459,431 | 1974 | 15,434,163 | 1973 | 15,423,976 | 1972 | 15,367,585 | 1971 | 15,198,361 | 1970 | 14,784,498 | 1969 | 14,258,710 | 1968 | 13,790,399 | 1967 | 13,297,064 | 1966 | 12,922,919 | 1965 | 12,960,895 | 1964 | 13,194,471 | 1963 | 13,342,502 | 1962 | 13,482,410 | 1961 | 13,585,006 | 1960 | 13,558,196 |
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