| Year | Value | | 2022 | 9,564,966 | | 2021 | 9,356,279 | | 2020 | 9,248,998 | | 2019 | 9,080,189 | | 2018 | 8,862,073 | | 2017 | 8,827,268 | | 2016 | 8,944,489 | | 2015 | 9,186,221 | | 2014 | 9,735,033 | | 2013 | 10,204,281 | | 2012 | 10,499,160 | | 2011 | 10,324,299 | | 2010 | 9,917,878 | | 2009 | 9,770,518 | | 2008 | 9,690,169 | | 2007 | 9,417,590 | | 2006 | 8,910,353 | | 2005 | 8,588,948 | | 2004 | 8,424,073 | | 2003 | 8,268,708 | | 2002 | 8,121,671 | | 2001 | 7,976,889 | | 2000 | 7,836,317 | | 1999 | 7,699,680 | | 1998 | 7,562,714 | | 1997 | 7,424,973 | | 1996 | 7,284,867 | | 1995 | 7,141,839 | | 1994 | 6,994,170 | | 1993 | 6,828,770 | | 1992 | 6,664,114 | | 1991 | 6,501,196 | | 1990 | 6,337,150 | | 1989 | 6,170,724 | | 1988 | 6,002,004 | | 1987 | 5,831,543 | | 1986 | 5,661,163 | | 1985 | 5,492,771 | | 1984 | 5,327,410 | | 1983 | 5,165,978 | | 1982 | 5,015,211 | | 1981 | 4,874,429 | | 1980 | 4,742,431 | | 1979 | 4,611,979 | | 1978 | 4,483,528 | | 1977 | 4,358,472 | | 1976 | 4,237,011 | | 1975 | 4,118,846 | | 1974 | 4,004,039 | | 1973 | 3,893,381 | | 1972 | 3,785,105 | | 1971 | 3,677,855 | | 1970 | 3,580,142 | | 1969 | 3,503,584 | | 1968 | 3,429,316 | | 1967 | 3,357,749 | | 1966 | 3,288,237 | | 1965 | 3,220,748 | | 1964 | 3,155,578 | | 1963 | 3,093,038 | | 1962 | 3,032,743 | | 1961 | 2,974,508 | | 1960 | 2,913,647 |
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