Year | Value | 2022 | 33,545,224 | 2021 | 33,165,460 | 2020 | 32,189,663 | 2019 | 30,947,991 | 2018 | 29,707,547 | 2017 | 28,330,430 | 2016 | 27,168,735 | 2015 | 26,704,935 | 2014 | 26,476,445 | 2013 | 25,982,022 | 2012 | 25,515,396 | 2011 | 25,184,010 | 2010 | 24,861,138 | 2009 | 24,461,985 | 2008 | 24,105,440 | 2007 | 23,773,059 | 2006 | 23,479,887 | 2005 | 23,225,089 | 2004 | 23,074,541 | 2003 | 22,969,666 | 2002 | 22,843,553 | 2001 | 22,722,374 | 2000 | 22,572,074 | 1999 | 22,339,199 | 1998 | 22,219,925 | 1997 | 22,162,823 | 1996 | 21,969,274 | 1995 | 21,797,029 | 1994 | 21,441,451 | 1993 | 20,488,070 | 1992 | 19,266,833 | 1991 | 18,186,043 | 1990 | 17,241,074 | 1989 | 16,844,515 | 1988 | 17,184,373 | 1987 | 17,838,559 | 1986 | 18,416,376 | 1985 | 18,775,785 | 1984 | 18,823,893 | 1983 | 18,645,232 | 1982 | 18,361,301 | 1981 | 17,985,233 | 1980 | 17,593,950 | 1979 | 17,161,336 | 1978 | 16,674,121 | 1977 | 16,256,886 | 1976 | 15,930,006 | 1975 | 15,632,541 | 1974 | 15,335,392 | 1973 | 15,059,053 | 1972 | 14,735,970 | 1971 | 14,385,919 | 1970 | 14,050,256 | 1969 | 13,752,439 | 1968 | 13,443,559 | 1967 | 13,084,801 | 1966 | 12,738,845 | 1965 | 12,417,778 | 1964 | 12,119,690 | 1963 | 11,875,707 | 1962 | 11,673,529 | 1961 | 11,432,361 | 1960 | 11,162,902 |
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