Year | Value | 2022 | 27,276,481 | 2021 | 26,067,805 | 2020 | 25,407,986 | 2019 | 25,175,348 | 2018 | 25,203,954 | 2017 | 25,316,086 | 2016 | 25,159,002 | 2015 | 24,784,710 | 2014 | 24,342,576 | 2013 | 23,794,895 | 2012 | 23,158,604 | 2011 | 22,483,444 | 2010 | 21,900,812 | 2009 | 21,452,873 | 2008 | 21,072,277 | 2007 | 20,666,492 | 2006 | 20,219,417 | 2005 | 19,708,622 | 2004 | 19,157,772 | 2003 | 18,525,752 | 2002 | 17,785,426 | 2001 | 17,062,975 | 2000 | 16,302,468 | 1999 | 15,468,740 | 1998 | 14,631,853 | 1997 | 13,887,774 | 1996 | 13,278,138 | 1995 | 12,825,645 | 1994 | 12,575,407 | 1993 | 12,481,822 | 1992 | 12,465,781 | 1991 | 12,444,529 | 1990 | 12,337,164 | 1989 | 12,077,118 | 1988 | 11,724,511 | 1987 | 11,391,283 | 1986 | 11,103,490 | 1985 | 10,850,583 | 1984 | 10,561,031 | 1983 | 10,279,327 | 1982 | 10,025,446 | 1981 | 9,754,312 | 1980 | 9,444,663 | 1979 | 9,057,664 | 1978 | 8,571,803 | 1977 | 8,081,031 | 1976 | 7,633,919 | 1975 | 7,224,961 | 1974 | 6,909,111 | 1973 | 6,676,917 | 1972 | 6,454,209 | 1971 | 6,202,945 | 1970 | 5,950,449 | 1969 | 5,740,470 | 1968 | 5,582,293 | 1967 | 5,444,572 | 1966 | 5,329,162 | 1965 | 5,241,394 | 1964 | 5,147,534 | 1963 | 5,005,085 | 1962 | 4,878,559 | 1961 | 4,839,644 | 1960 | 4,877,694 |
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