| Year | Value | | 2022 | 12,746,359 | | 2021 | 12,572,937 | | 2020 | 12,387,061 | | 2019 | 12,187,255 | | 2018 | 11,985,216 | | 2017 | 11,776,202 | | 2016 | 11,573,007 | | 2015 | 11,357,173 | | 2014 | 11,112,873 | | 2013 | 10,788,241 | | 2012 | 10,351,684 | | 2011 | 9,950,426 | | 2010 | 9,659,908 | | 2009 | 9,395,660 | | 2008 | 9,079,028 | | 2007 | 8,921,274 | | 2006 | 9,013,057 | | 2005 | 8,963,747 | | 2004 | 8,716,508 | | 2003 | 8,483,911 | | 2002 | 8,243,127 | | 2001 | 7,996,371 | | 2000 | 7,759,075 | | 1999 | 7,517,347 | | 1998 | 7,287,669 | | 1997 | 7,055,407 | | 1996 | 6,796,265 | | 1995 | 6,540,233 | | 1994 | 6,283,787 | | 1993 | 5,952,374 | | 1992 | 5,637,599 | | 1991 | 5,439,219 | | 1990 | 5,349,430 | | 1989 | 5,252,138 | | 1988 | 5,083,973 | | 1987 | 4,976,584 | | 1986 | 4,942,002 | | 1985 | 4,920,402 | | 1984 | 4,900,353 | | 1983 | 4,845,503 | | 1982 | 4,797,628 | | 1981 | 4,757,125 | | 1980 | 4,707,545 | | 1979 | 4,651,427 | | 1978 | 4,592,275 | | 1977 | 4,537,974 | | 1976 | 4,511,993 | | 1975 | 4,486,842 | | 1974 | 4,457,795 | | 1973 | 4,423,547 | | 1972 | 4,384,808 | | 1971 | 4,344,887 | | 1970 | 4,301,883 | | 1969 | 4,256,097 | | 1968 | 4,209,989 | | 1967 | 4,163,663 | | 1966 | 4,117,155 | | 1965 | 4,081,431 | | 1964 | 4,071,366 | | 1963 | 4,058,832 | | 1962 | 4,041,835 | | 1961 | 4,034,634 | | 1960 | 4,045,422 |
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