| Year | Value | | 2022 | 4,952,626 | | 2021 | 5,212,725 | | 2020 | 5,501,030 | | 2019 | 5,777,422 | | 2018 | 5,956,610 | | 2017 | 6,060,376 | | 2016 | 6,082,398 | | 2015 | 6,026,265 | | 2014 | 5,972,608 | | 2013 | 5,901,583 | | 2012 | 5,802,829 | | 2011 | 5,728,467 | | 2010 | 5,638,321 | | 2009 | 5,539,095 | | 2008 | 5,419,826 | | 2007 | 5,246,831 | | 2006 | 5,022,116 | | 2005 | 4,616,667 | | 2004 | 3,977,680 | | 2003 | 3,338,229 | | 2002 | 2,890,069 | | 2001 | 2,759,170 | | 2000 | 3,039,934 | | 1999 | 3,656,511 | | 1998 | 4,431,675 | | 1997 | 5,126,637 | | 1996 | 5,446,716 | | 1995 | 5,415,668 | | 1994 | 5,148,414 | | 1993 | 4,727,719 | | 1992 | 4,395,833 | | 1991 | 4,242,083 | | 1990 | 4,288,111 | | 1989 | 4,560,242 | | 1988 | 4,938,415 | | 1987 | 5,225,949 | | 1986 | 5,408,918 | | 1985 | 5,490,769 | | 1984 | 5,432,162 | | 1983 | 5,275,471 | | 1982 | 5,020,504 | | 1981 | 4,662,524 | | 1980 | 4,249,728 | | 1979 | 3,869,755 | | 1978 | 3,603,237 | | 1977 | 3,368,669 | | 1976 | 3,181,353 | | 1975 | 3,195,955 | | 1974 | 3,402,205 | | 1973 | 3,601,470 | | 1972 | 3,857,397 | | 1971 | 4,209,670 | | 1970 | 4,416,478 | | 1969 | 4,400,836 | | 1968 | 4,289,514 | | 1967 | 4,157,593 | | 1966 | 4,013,807 | | 1965 | 3,873,079 | | 1964 | 3,730,497 | | 1963 | 3,644,760 | | 1962 | 3,575,844 | | 1961 | 3,475,427 | | 1960 | 3,439,863 |
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