| Year | Value | | 2022 | 6,430,770 | | 2021 | 6,341,855 | | 2020 | 6,250,438 | | 2019 | 6,158,420 | | 2018 | 6,065,066 | | 2017 | 5,968,383 | | 2016 | 5,868,561 | | 2015 | 5,766,431 | | 2014 | 5,663,152 | | 2013 | 5,560,095 | | 2012 | 5,458,682 | | 2011 | 5,360,811 | | 2010 | 5,267,970 | | 2009 | 5,180,957 | | 2008 | 5,100,083 | | 2007 | 5,024,894 | | 2006 | 4,954,029 | | 2005 | 4,885,775 | | 2004 | 4,819,792 | | 2003 | 4,758,988 | | 2002 | 4,698,968 | | 2001 | 4,635,094 | | 2000 | 4,569,132 | | 1999 | 4,501,079 | | 1998 | 4,431,517 | | 1997 | 4,363,672 | | 1996 | 4,301,093 | | 1995 | 4,226,623 | | 1994 | 4,133,037 | | 1993 | 4,031,698 | | 1992 | 3,926,369 | | 1991 | 3,821,782 | | 1990 | 3,720,278 | | 1989 | 3,621,303 | | 1988 | 3,525,110 | | 1987 | 3,430,501 | | 1986 | 3,336,773 | | 1985 | 3,246,887 | | 1984 | 3,162,165 | | 1983 | 3,082,202 | | 1982 | 3,005,972 | | 1981 | 2,932,934 | | 1980 | 2,862,903 | | 1979 | 2,794,392 | | 1978 | 2,726,327 | | 1977 | 2,659,019 | | 1976 | 2,592,280 | | 1975 | 2,525,760 | | 1974 | 2,459,325 | | 1973 | 2,393,323 | | 1972 | 2,328,374 | | 1971 | 2,264,434 | | 1970 | 2,201,432 | | 1969 | 2,139,557 | | 1968 | 2,078,581 | | 1967 | 2,018,024 | | 1966 | 1,957,557 | | 1965 | 1,897,095 | | 1964 | 1,836,621 | | 1963 | 1,776,387 | | 1962 | 1,716,868 | | 1961 | 1,658,569 | | 1960 | 1,602,052 |
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