| Year | Value | | 2022 | 12,211,217 | | 2021 | 12,061,787 | | 2020 | 11,916,732 | | 2019 | 11,758,414 | | 2018 | 11,588,198 | | 2017 | 11,395,780 | | 2016 | 11,215,321 | | 2015 | 11,064,007 | | 2014 | 10,942,263 | | 2013 | 10,845,625 | | 2012 | 10,767,253 | | 2011 | 10,676,971 | | 2010 | 10,538,605 | | 2009 | 10,366,075 | | 2008 | 10,176,620 | | 2007 | 9,960,355 | | 2006 | 9,714,572 | | 2005 | 9,458,362 | | 2004 | 9,193,914 | | 2003 | 8,932,139 | | 2002 | 8,684,083 | | 2001 | 8,401,291 | | 2000 | 8,047,442 | | 1999 | 7,681,574 | | 1998 | 7,330,400 | | 1997 | 6,984,936 | | 1996 | 6,662,483 | | 1995 | 6,370,551 | | 1994 | 6,123,485 | | 1993 | 5,909,825 | | 1992 | 5,752,758 | | 1991 | 5,615,422 | | 1990 | 5,448,119 | | 1989 | 5,288,721 | | 1988 | 5,139,209 | | 1987 | 4,996,874 | | 1986 | 4,866,177 | | 1985 | 4,747,413 | | 1984 | 4,654,883 | | 1983 | 4,574,093 | | 1982 | 4,464,128 | | 1981 | 4,319,150 | | 1980 | 4,145,311 | | 1979 | 3,974,140 | | 1978 | 3,823,479 | | 1977 | 3,678,355 | | 1976 | 3,530,792 | | 1975 | 3,384,278 | | 1974 | 3,242,966 | | 1973 | 3,107,463 | | 1972 | 2,976,661 | | 1971 | 2,849,764 | | 1970 | 2,724,228 | | 1969 | 2,613,742 | | 1968 | 2,531,070 | | 1967 | 2,472,529 | | 1966 | 2,434,374 | | 1965 | 2,414,950 | | 1964 | 2,401,885 | | 1963 | 2,380,110 | | 1962 | 2,348,580 | | 1961 | 2,310,868 | | 1960 | 2,264,672 |
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