| Year | Value | | 2022 | 27,521,795 | | 2021 | 26,624,851 | | 2020 | 25,727,997 | | 2019 | 24,856,644 | | 2018 | 24,050,377 | | 2017 | 23,328,329 | | 2016 | 22,668,664 | | 2015 | 22,059,634 | | 2014 | 21,504,294 | | 2013 | 20,957,442 | | 2012 | 20,382,793 | | 2011 | 19,733,431 | | 2010 | 19,077,822 | | 2009 | 18,458,802 | | 2008 | 17,858,427 | | 2007 | 17,276,050 | | 2006 | 16,669,241 | | 2005 | 16,068,417 | | 2004 | 15,541,951 | | 2003 | 15,080,263 | | 2002 | 14,673,190 | | 2001 | 14,322,123 | | 2000 | 14,030,721 | | 1999 | 13,754,314 | | 1998 | 13,454,014 | | 1997 | 13,153,891 | | 1996 | 12,852,516 | | 1995 | 12,508,406 | | 1994 | 12,089,781 | | 1993 | 11,684,380 | | 1992 | 11,296,375 | | 1991 | 10,905,544 | | 1990 | 10,595,017 | | 1989 | 10,318,870 | | 1988 | 10,047,574 | | 1987 | 9,798,249 | | 1986 | 9,544,256 | | 1985 | 9,281,744 | | 1984 | 9,010,987 | | 1983 | 8,728,289 | | 1982 | 8,431,332 | | 1981 | 8,172,062 | | 1980 | 7,996,160 | | 1979 | 7,817,853 | | 1978 | 7,603,493 | | 1977 | 7,443,896 | | 1976 | 7,347,410 | | 1975 | 7,228,910 | | 1974 | 7,082,027 | | 1973 | 6,940,532 | | 1972 | 6,800,700 | | 1971 | 6,655,115 | | 1970 | 6,508,449 | | 1969 | 6,369,113 | | 1968 | 6,239,922 | | 1967 | 6,116,563 | | 1966 | 5,994,836 | | 1965 | 5,869,750 | | 1964 | 5,740,029 | | 1963 | 5,608,630 | | 1962 | 5,477,341 | | 1961 | 5,349,239 | | 1960 | 5,231,291 |
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