Year | Value | 2022 | 15,673,166 | 2021 | 15,795,372 | 2020 | 15,909,514 | 2019 | 16,010,236 | 2018 | 16,170,506 | 2017 | 16,330,202 | 2016 | 16,434,350 | 2015 | 16,484,079 | 2014 | 16,526,727 | 2013 | 16,516,292 | 2012 | 16,422,880 | 2011 | 16,324,795 | 2010 | 16,297,081 | 2009 | 16,170,380 | 2008 | 16,009,518 | 2007 | 15,881,833 | 2006 | 15,774,860 | 2005 | 15,652,368 | 2004 | 15,506,746 | 2003 | 15,338,735 | 2002 | 15,169,120 | 2001 | 15,014,601 | 2000 | 14,892,056 | 1999 | 14,819,677 | 1998 | 14,785,776 | 1997 | 14,737,090 | 1996 | 14,600,238 | 1995 | 14,194,165 | 1994 | 13,640,038 | 1993 | 13,152,608 | 1992 | 12,651,818 | 1991 | 12,259,200 | 1990 | 12,246,099 | 1989 | 12,434,780 | 1988 | 12,529,206 | 1987 | 12,635,940 | 1986 | 12,737,698 | 1985 | 12,734,934 | 1984 | 12,666,018 | 1983 | 12,582,810 | 1982 | 12,527,575 | 1981 | 12,514,513 | 1980 | 12,534,955 | 1979 | 12,565,233 | 1978 | 12,620,413 | 1977 | 12,645,392 | 1976 | 12,559,981 | 1975 | 12,382,205 | 1974 | 12,152,652 | 1973 | 11,918,933 | 1972 | 11,720,865 | 1971 | 11,581,920 | 1970 | 11,462,390 | 1969 | 11,121,219 | 1968 | 10,395,464 | 1967 | 9,506,571 | 1966 | 8,666,614 | 1965 | 8,020,169 | 1964 | 7,938,650 | 1963 | 8,481,269 | 1962 | 9,259,665 | 1961 | 10,008,841 | 1960 | 10,595,997 |
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