| Year | Value | | 2022 | 12,354,019 | | 2021 | 12,010,696 | | 2020 | 11,678,660 | | 2019 | 11,347,643 | | 2018 | 11,018,037 | | 2017 | 10,681,232 | | 2016 | 10,330,075 | | 2015 | 9,977,631 | | 2014 | 9,640,792 | | 2013 | 9,323,481 | | 2012 | 9,007,434 | | 2011 | 8,684,549 | | 2010 | 8,389,134 | | 2009 | 8,121,748 | | 2008 | 7,875,546 | | 2007 | 7,650,401 | | 2006 | 7,418,479 | | 2005 | 7,180,917 | | 2004 | 6,956,469 | | 2003 | 6,721,904 | | 2002 | 6,465,061 | | 2001 | 6,225,972 | | 2000 | 6,042,390 | | 1999 | 5,882,613 | | 1998 | 5,732,128 | | 1997 | 5,628,553 | | 1996 | 5,559,164 | | 1995 | 5,464,429 | | 1994 | 5,350,262 | | 1993 | 5,240,842 | | 1992 | 5,106,663 | | 1991 | 4,969,986 | | 1990 | 4,862,338 | | 1989 | 4,761,744 | | 1988 | 4,665,334 | | 1987 | 4,579,068 | | 1986 | 4,489,571 | | 1985 | 4,392,729 | | 1984 | 4,285,712 | | 1983 | 4,168,128 | | 1982 | 4,047,266 | | 1981 | 3,945,302 | | 1980 | 3,869,731 | | 1979 | 3,789,478 | | 1978 | 3,691,620 | | 1977 | 3,601,355 | | 1976 | 3,523,057 | | 1975 | 3,445,612 | | 1974 | 3,370,335 | | 1973 | 3,297,609 | | 1972 | 3,229,320 | | 1971 | 3,162,787 | | 1970 | 3,096,080 | | 1969 | 3,032,179 | | 1968 | 2,968,011 | | 1967 | 2,902,670 | | 1966 | 2,839,770 | | 1965 | 2,778,977 | | 1964 | 2,719,475 | | 1963 | 2,665,663 | | 1962 | 2,617,203 | | 1961 | 2,569,034 | | 1960 | 2,520,135 |
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