Year | Value | 2022 | 36,890,933 | 2021 | 36,807,094 | 2020 | 36,706,197 | 2019 | 36,584,375 | 2018 | 36,456,433 | 2017 | 36,304,062 | 2016 | 36,120,993 | 2015 | 35,928,923 | 2014 | 35,728,989 | 2013 | 35,505,484 | 2012 | 35,263,239 | 2011 | 35,010,449 | 2010 | 34,759,118 | 2009 | 34,506,526 | 2008 | 34,245,582 | 2007 | 33,977,340 | 2006 | 33,707,262 | 2005 | 33,442,524 | 2004 | 33,172,952 | 2003 | 32,892,200 | 2002 | 32,601,809 | 2001 | 32,302,543 | 2000 | 31,994,172 | 1999 | 31,651,539 | 1998 | 31,259,606 | 1997 | 30,832,850 | 1996 | 30,392,549 | 1995 | 29,952,707 | 1994 | 29,494,978 | 1993 | 29,023,040 | 1992 | 28,552,103 | 1991 | 28,090,082 | 1990 | 27,613,526 | 1989 | 27,133,975 | 1988 | 26,672,809 | 1987 | 26,203,565 | 1986 | 25,731,907 | 1985 | 25,254,500 | 1984 | 24,771,150 | 1983 | 24,283,699 | 1982 | 23,793,835 | 1981 | 23,301,459 | 1980 | 22,800,284 | 1979 | 22,305,813 | 1978 | 21,824,983 | 1977 | 21,341,107 | 1976 | 20,859,346 | 1975 | 20,372,680 | 1974 | 19,870,071 | 1973 | 19,358,255 | 1972 | 18,842,044 | 1971 | 18,332,692 | 1970 | 17,828,927 | 1969 | 17,331,828 | 1968 | 16,847,272 | 1967 | 16,368,934 | 1966 | 15,896,337 | 1965 | 15,429,462 | 1964 | 14,970,794 | 1963 | 14,525,319 | 1962 | 14,092,853 | 1961 | 13,674,281 | 1960 | 13,274,492 |
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