| Year | Value | | 2022 | 14,771,969 | | 2021 | 14,334,642 | | 2020 | 13,901,244 | | 2019 | 13,459,446 | | 2018 | 13,018,188 | | 2017 | 12,586,049 | | 2016 | 12,170,027 | | 2015 | 11,774,108 | | 2014 | 11,399,560 | | 2013 | 11,048,467 | | 2012 | 10,718,728 | | 2011 | 10,404,260 | | 2010 | 10,095,084 | | 2009 | 9,769,715 | | 2008 | 9,443,693 | | 2007 | 9,151,194 | | 2006 | 8,887,725 | | 2005 | 8,640,997 | | 2004 | 8,424,110 | | 2003 | 8,222,610 | | 2002 | 8,001,710 | | 2001 | 7,770,551 | | 2000 | 7,546,451 | | 1999 | 7,337,719 | | 1998 | 7,150,211 | | 1997 | 6,983,941 | | 1996 | 6,822,240 | | 1995 | 6,659,198 | | 1994 | 6,517,431 | | 1993 | 6,389,376 | | 1992 | 6,255,425 | | 1991 | 6,130,326 | | 1990 | 6,012,498 | | 1989 | 5,889,373 | | 1988 | 5,767,649 | | 1987 | 5,646,574 | | 1986 | 5,522,902 | | 1985 | 5,390,243 | | 1984 | 5,251,258 | | 1983 | 5,116,723 | | 1982 | 4,984,708 | | 1981 | 4,856,639 | | 1980 | 4,749,054 | | 1979 | 4,648,661 | | 1978 | 4,532,119 | | 1977 | 4,416,720 | | 1976 | 4,309,106 | | 1975 | 4,201,773 | | 1974 | 4,094,031 | | 1973 | 3,989,100 | | 1972 | 3,888,872 | | 1971 | 3,793,187 | | 1970 | 3,700,831 | | 1969 | 3,612,830 | | 1968 | 3,529,584 | | 1967 | 3,450,066 | | 1966 | 3,373,841 | | 1965 | 3,298,358 | | 1964 | 3,223,276 | | 1963 | 3,150,375 | | 1962 | 3,079,884 | | 1961 | 3,011,729 | | 1960 | 2,947,405 |
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