| Year | Value | | 2022 | 14,247,013 | | 2021 | 13,717,815 | | 2020 | 13,210,212 | | 2019 | 12,715,830 | | 2018 | 12,242,991 | | 2017 | 11,801,303 | | 2016 | 11,378,262 | | 2015 | 10,968,461 | | 2014 | 10,576,043 | | 2013 | 10,195,271 | | 2012 | 9,830,549 | | 2011 | 9,503,213 | | 2010 | 9,217,856 | | 2009 | 8,953,332 | | 2008 | 8,702,278 | | 2007 | 8,477,443 | | 2006 | 8,260,339 | | 2005 | 8,023,289 | | 2004 | 7,764,433 | | 2003 | 7,506,662 | | 2002 | 7,281,784 | | 2001 | 7,097,007 | | 2000 | 6,947,531 | | 1999 | 6,825,510 | | 1998 | 6,704,966 | | 1997 | 6,556,903 | | 1996 | 6,388,040 | | 1995 | 6,210,868 | | 1994 | 6,023,887 | | 1993 | 5,849,043 | | 1992 | 5,697,773 | | 1991 | 5,571,293 | | 1990 | 5,470,480 | | 1989 | 5,366,064 | | 1988 | 5,264,314 | | 1987 | 5,170,775 | | 1986 | 5,071,563 | | 1985 | 4,974,883 | | 1984 | 4,878,960 | | 1983 | 4,782,175 | | 1982 | 4,689,035 | | 1981 | 4,612,718 | | 1980 | 4,543,974 | | 1979 | 4,457,575 | | 1978 | 4,360,632 | | 1977 | 4,267,176 | | 1976 | 4,181,549 | | 1975 | 4,096,160 | | 1974 | 4,009,448 | | 1973 | 3,922,893 | | 1972 | 3,837,728 | | 1971 | 3,754,204 | | 1970 | 3,668,918 | | 1969 | 3,584,360 | | 1968 | 3,503,278 | | 1967 | 3,425,491 | | 1966 | 3,350,246 | | 1965 | 3,277,213 | | 1964 | 3,206,486 | | 1963 | 3,138,948 | | 1962 | 3,074,238 | | 1961 | 3,010,963 | | 1960 | 2,949,031 |
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