Year | Value | 2022 | 33,475,870 | 2021 | 32,833,031 | 2020 | 32,180,401 | 2019 | 31,522,290 | 2018 | 30,870,641 | 2017 | 30,222,262 | 2016 | 29,554,303 | 2015 | 28,870,939 | 2014 | 28,196,358 | 2013 | 27,525,597 | 2012 | 26,858,762 | 2011 | 26,205,941 | 2010 | 25,574,719 | 2009 | 24,950,762 | 2008 | 24,326,087 | 2007 | 23,708,320 | 2006 | 23,098,586 | 2005 | 22,496,951 | 2004 | 21,906,444 | 2003 | 21,329,514 | 2002 | 20,758,326 | 2001 | 20,195,577 | 2000 | 19,665,502 | 1999 | 19,176,791 | 1998 | 18,714,708 | 1997 | 18,268,040 | 1996 | 17,844,010 | 1995 | 17,438,874 | 1994 | 17,040,854 | 1993 | 16,643,633 | 1992 | 16,241,548 | 1991 | 15,843,471 | 1990 | 15,446,982 | 1989 | 15,052,447 | 1988 | 14,671,677 | 1987 | 14,310,790 | 1986 | 13,971,682 | 1985 | 13,651,443 | 1984 | 13,342,487 | 1983 | 12,984,131 | 1982 | 12,584,976 | 1981 | 12,212,960 | 1980 | 11,865,246 | 1979 | 11,515,675 | 1978 | 11,163,230 | 1977 | 10,825,496 | 1976 | 10,509,006 | 1975 | 10,209,848 | 1974 | 9,918,979 | 1973 | 9,637,197 | 1972 | 9,365,952 | 1971 | 9,108,878 | 1970 | 8,861,895 | 1969 | 8,629,855 | 1968 | 8,418,152 | 1967 | 8,216,086 | 1966 | 8,019,658 | 1965 | 7,827,726 | 1964 | 7,640,196 | 1963 | 7,458,243 | 1962 | 7,281,192 | 1961 | 7,109,029 | 1960 | 6,911,510 |
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