Year | Value | 2022 | 55,974,335 | 2021 | 56,303,014 | 2020 | 57,970,723 | 2019 | 59,456,993 | 2018 | 59,832,788 | 2017 | 58,881,835 | 2016 | 57,441,913 | 2015 | 55,712,339 | 2014 | 53,472,895 | 2013 | 50,961,245 | 2012 | 48,119,956 | 2011 | 45,250,065 | 2010 | 42,400,359 | 2009 | 39,485,885 | 2008 | 36,985,011 | 2007 | 34,905,031 | 2006 | 33,505,885 | 2005 | 32,902,089 | 2004 | 32,815,605 | 2003 | 33,056,534 | 2002 | 33,443,050 | 2001 | 33,502,266 | 2000 | 33,213,181 | 1999 | 32,790,175 | 1998 | 32,207,157 | 1997 | 31,448,240 | 1996 | 30,624,667 | 1995 | 29,958,387 | 1994 | 29,454,532 | 1993 | 28,957,548 | 1992 | 28,421,916 | 1991 | 27,799,938 | 1990 | 27,053,087 | 1989 | 26,238,147 | 1988 | 25,261,069 | 1987 | 24,134,337 | 1986 | 23,117,772 | 1985 | 22,181,775 | 1984 | 21,211,043 | 1983 | 20,290,802 | 1982 | 19,508,059 | 1981 | 18,849,011 | 1980 | 18,347,488 | 1979 | 18,113,180 | 1978 | 18,086,801 | 1977 | 18,091,318 | 1976 | 18,032,311 | 1975 | 17,848,631 | 1974 | 17,501,029 | 1973 | 17,025,119 | 1972 | 16,569,357 | 1971 | 16,193,055 | 1970 | 15,846,983 | 1969 | 15,485,122 | 1968 | 15,164,525 | 1967 | 14,880,151 | 1966 | 14,532,644 | 1965 | 14,141,414 | 1964 | 13,723,177 | 1963 | 13,281,161 | 1962 | 12,871,604 | 1961 | 12,613,875 | 1960 | 12,563,118 |
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