| Year | Value | | 2022 | 16,673,411 | | 2021 | 16,313,210 | | 2020 | 15,963,067 | | 2019 | 15,593,113 | | 2018 | 15,211,556 | | 2017 | 14,831,892 | | 2016 | 14,453,847 | | 2015 | 14,077,389 | | 2014 | 13,700,388 | | 2013 | 13,323,201 | | 2012 | 12,950,282 | | 2011 | 12,583,615 | | 2010 | 12,224,951 | | 2009 | 11,874,775 | | 2008 | 11,531,790 | | 2007 | 11,195,418 | | 2006 | 10,864,747 | | 2005 | 10,548,931 | | 2004 | 10,262,472 | | 2003 | 9,997,157 | | 2002 | 9,739,899 | | 2001 | 9,488,026 | | 2000 | 9,237,162 | | 1999 | 8,986,445 | | 1998 | 8,739,457 | | 1997 | 8,495,862 | | 1996 | 8,254,738 | | 1995 | 8,005,372 | | 1994 | 7,736,100 | | 1993 | 7,459,309 | | 1992 | 7,188,177 | | 1991 | 6,924,810 | | 1990 | 6,669,864 | | 1989 | 6,423,814 | | 1988 | 6,186,173 | | 1987 | 5,954,881 | | 1986 | 5,731,401 | | 1985 | 5,518,565 | | 1984 | 5,316,868 | | 1983 | 5,126,336 | | 1982 | 4,947,417 | | 1981 | 4,779,373 | | 1980 | 4,620,502 | | 1979 | 4,470,899 | | 1978 | 4,331,194 | | 1977 | 4,199,869 | | 1976 | 4,074,909 | | 1975 | 3,956,492 | | 1974 | 3,844,816 | | 1973 | 3,739,329 | | 1972 | 3,638,784 | | 1971 | 3,543,145 | | 1970 | 3,452,599 | | 1969 | 3,366,945 | | 1968 | 3,286,409 | | 1967 | 3,210,247 | | 1966 | 3,137,925 | | 1965 | 3,069,773 | | 1964 | 3,005,276 | | 1963 | 2,944,847 | | 1962 | 2,887,401 | | 1961 | 2,830,873 | | 1960 | 2,776,227 |
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