| Year | Value | | 2022 | 15,765,996 | | 2021 | 15,452,555 | | 2020 | 15,131,831 | | 2019 | 14,777,470 | | 2018 | 14,377,745 | | 2017 | 13,979,983 | | 2016 | 13,605,739 | | 2015 | 13,250,667 | | 2014 | 12,875,188 | | 2013 | 12,457,090 | | 2012 | 12,033,824 | | 2011 | 11,638,239 | | 2010 | 11,258,056 | | 2009 | 10,886,487 | | 2008 | 10,541,973 | | 2007 | 10,212,470 | | 2006 | 9,896,607 | | 2005 | 9,604,358 | | 2004 | 9,323,431 | | 2003 | 9,044,294 | | 2002 | 8,763,147 | | 2001 | 8,469,569 | | 2000 | 8,164,220 | | 1999 | 7,860,981 | | 1998 | 7,566,781 | | 1997 | 7,293,408 | | 1996 | 7,063,914 | | 1995 | 6,856,626 | | 1994 | 6,651,004 | | 1993 | 6,446,346 | | 1992 | 6,242,195 | | 1991 | 6,030,865 | | 1990 | 5,828,325 | | 1989 | 5,578,529 | | 1988 | 5,357,696 | | 1987 | 5,149,015 | | 1986 | 4,941,025 | | 1985 | 4,737,097 | | 1984 | 4,535,057 | | 1983 | 4,326,242 | | 1982 | 4,121,306 | | 1981 | 3,942,933 | | 1980 | 3,793,064 | | 1979 | 3,666,022 | | 1978 | 3,577,057 | | 1977 | 3,522,007 | | 1976 | 3,470,052 | | 1975 | 3,421,125 | | 1974 | 3,381,341 | | 1973 | 3,339,581 | | 1972 | 3,293,013 | | 1971 | 3,244,513 | | 1970 | 3,194,627 | | 1969 | 3,139,769 | | 1968 | 3,078,146 | | 1967 | 3,012,500 | | 1966 | 2,945,154 | | 1965 | 2,878,735 | | 1964 | 2,812,374 | | 1963 | 2,744,003 | | 1962 | 2,673,732 | | 1961 | 2,603,462 | | 1960 | 2,535,238 |
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