Year | Value | 2022 | 46,251,447 | 2021 | 46,002,889 | 2020 | 45,775,793 | 2019 | 45,513,974 | 2018 | 45,467,672 | 2017 | 45,542,765 | 2016 | 45,801,574 | 2015 | 46,133,395 | 2014 | 46,342,064 | 2013 | 46,437,711 | 2012 | 46,449,335 | 2011 | 46,210,704 | 2010 | 46,020,250 | 2009 | 46,025,304 | 2008 | 46,052,659 | 2007 | 45,935,118 | 2006 | 45,874,172 | 2005 | 45,730,217 | 2004 | 45,302,098 | 2003 | 44,719,129 | 2002 | 44,143,209 | 2001 | 43,562,803 | 2000 | 42,959,686 | 1999 | 42,354,029 | 1998 | 41,731,074 | 1997 | 41,084,755 | 1996 | 40,564,242 | 1995 | 40,004,122 | 1994 | 39,339,532 | 1993 | 38,949,541 | 1992 | 38,823,408 | 1991 | 38,292,517 | 1990 | 37,053,295 | 1989 | 35,752,760 | 1988 | 34,466,900 | 1987 | 33,026,270 | 1986 | 31,784,204 | 1985 | 31,317,608 | 1984 | 31,130,377 | 1983 | 30,671,809 | 1982 | 30,201,236 | 1981 | 29,856,539 | 1980 | 29,506,301 | 1979 | 29,126,638 | 1978 | 28,779,577 | 1977 | 28,509,027 | 1976 | 28,285,770 | 1975 | 28,140,875 | 1974 | 28,151,768 | 1973 | 28,182,419 | 1972 | 28,157,972 | 1971 | 28,168,671 | 1970 | 28,122,596 | 1969 | 28,008,178 | 1968 | 28,044,386 | 1967 | 28,137,111 | 1966 | 27,980,668 | 1965 | 27,842,962 | 1964 | 27,496,920 | 1963 | 26,365,975 | 1962 | 24,889,079 | 1961 | 23,662,693 | 1960 | 22,646,870 |
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