| Year | Value | | 2022 | 17,590,767 | | 2021 | 17,051,491 | | 2020 | 16,517,497 | | 2019 | 15,983,035 | | 2018 | 15,445,494 | | 2017 | 14,915,293 | | 2016 | 14,390,171 | | 2015 | 13,878,923 | | 2014 | 13,381,965 | | 2013 | 12,894,065 | | 2012 | 12,417,550 | | 2011 | 11,955,662 | | 2010 | 11,510,656 | | 2009 | 11,084,704 | | 2008 | 10,678,522 | | 2007 | 10,289,510 | | 2006 | 9,917,959 | | 2005 | 9,564,193 | | 2004 | 9,226,105 | | 2003 | 8,904,704 | | 2002 | 8,603,948 | | 2001 | 8,322,504 | | 2000 | 8,054,751 | | 1999 | 7,799,340 | | 1998 | 7,553,740 | | 1997 | 7,309,709 | | 1996 | 7,068,150 | | 1995 | 6,834,872 | | 1994 | 6,616,409 | | 1993 | 6,416,502 | | 1992 | 6,224,203 | | 1991 | 6,029,631 | | 1990 | 5,837,431 | | 1989 | 5,651,993 | | 1988 | 5,471,528 | | 1987 | 5,298,022 | | 1986 | 5,125,813 | | 1985 | 4,952,001 | | 1984 | 4,782,882 | | 1983 | 4,619,813 | | 1982 | 4,461,876 | | 1981 | 4,310,289 | | 1980 | 4,165,901 | | 1979 | 4,028,871 | | 1978 | 3,899,460 | | 1977 | 3,776,071 | | 1976 | 3,659,998 | | 1975 | 3,549,297 | | 1974 | 3,440,057 | | 1973 | 3,333,481 | | 1972 | 3,232,291 | | 1971 | 3,144,102 | | 1970 | 3,076,353 | | 1969 | 3,026,265 | | 1968 | 2,989,203 | | 1967 | 2,959,577 | | 1966 | 2,930,305 | | 1965 | 2,897,642 | | 1964 | 2,860,608 | | 1963 | 2,820,354 | | 1962 | 2,778,711 | | 1961 | 2,736,939 | | 1960 | 2,686,966 |
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