Year | Value | 2022 | 42,696,478 | 2021 | 42,248,949 | 2020 | 41,796,990 | 2019 | 41,339,571 | 2018 | 40,877,099 | 2017 | 40,410,674 | 2016 | 39,940,546 | 2015 | 39,467,043 | 2014 | 38,990,109 | 2013 | 38,509,756 | 2012 | 38,027,774 | 2011 | 37,543,830 | 2010 | 37,055,902 | 2009 | 36,897,033 | 2008 | 36,459,843 | 2007 | 36,034,446 | 2006 | 35,608,120 | 2005 | 35,175,563 | 2004 | 34,747,780 | 2003 | 34,330,154 | 2002 | 33,910,889 | 2001 | 33,480,950 | 2000 | 33,045,629 | 1999 | 32,603,604 | 1998 | 32,160,222 | 1997 | 31,720,057 | 1996 | 31,272,164 | 1995 | 30,809,888 | 1994 | 30,336,257 | 1993 | 29,859,584 | 1992 | 29,386,348 | 1991 | 28,910,601 | 1990 | 28,389,540 | 1989 | 27,859,735 | 1988 | 27,327,921 | 1987 | 26,797,140 | 1986 | 26,272,907 | 1985 | 25,755,554 | 1984 | 25,244,303 | 1983 | 24,733,787 | 1982 | 24,225,416 | 1981 | 23,720,282 | 1980 | 23,228,918 | 1979 | 22,761,324 | 1978 | 22,297,552 | 1977 | 21,839,851 | 1976 | 21,391,331 | 1975 | 20,951,181 | 1974 | 20,504,103 | 1973 | 20,056,003 | 1972 | 19,626,980 | 1971 | 19,214,226 | 1970 | 18,807,203 | 1969 | 18,400,662 | 1968 | 18,005,236 | 1967 | 17,613,474 | 1966 | 17,225,308 | 1965 | 16,842,160 | 1964 | 16,464,585 | 1963 | 16,089,028 | 1962 | 15,716,292 | 1961 | 15,348,560 | 1960 | 14,979,650 |
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