| Year | Value | | 2022 | 19,059,886 | | 2021 | 18,376,415 | | 2020 | 17,728,151 | | 2019 | 17,102,170 | | 2018 | 16,506,933 | | 2017 | 15,952,221 | | 2016 | 15,422,406 | | 2015 | 14,925,626 | | 2014 | 14,485,752 | | 2013 | 14,103,291 | | 2012 | 13,774,497 | | 2011 | 13,445,384 | | 2010 | 13,114,527 | | 2009 | 12,801,283 | | 2008 | 12,489,485 | | 2007 | 12,161,941 | | 2006 | 11,798,785 | | 2005 | 11,421,469 | | 2004 | 11,066,252 | | 2003 | 10,728,305 | | 2002 | 10,379,979 | | 2001 | 10,043,795 | | 2000 | 9,764,026 | | 1999 | 9,503,883 | | 1998 | 9,242,496 | | 1997 | 9,005,669 | | 1996 | 8,769,784 | | 1995 | 8,508,631 | | 1994 | 8,231,347 | | 1993 | 7,942,009 | | 1992 | 7,635,613 | | 1991 | 7,358,549 | | 1990 | 7,157,856 | | 1989 | 6,986,141 | | 1988 | 6,825,761 | | 1987 | 6,713,444 | | 1986 | 6,633,332 | | 1985 | 6,531,449 | | 1984 | 6,398,586 | | 1983 | 6,260,457 | | 1982 | 6,111,361 | | 1981 | 5,976,851 | | 1980 | 5,880,266 | | 1979 | 5,781,425 | | 1978 | 5,662,395 | | 1977 | 5,555,209 | | 1976 | 5,459,560 | | 1975 | 5,353,521 | | 1974 | 5,241,219 | | 1973 | 5,124,371 | | 1972 | 5,008,404 | | 1971 | 4,895,480 | | 1970 | 4,784,449 | | 1969 | 4,677,626 | | 1968 | 4,570,996 | | 1967 | 4,464,253 | | 1966 | 4,361,619 | | 1965 | 4,262,322 | | 1964 | 4,164,405 | | 1963 | 4,070,262 | | 1962 | 3,979,940 | | 1961 | 3,889,463 | | 1960 | 3,799,881 |
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