| Year | Value | | 2022 | 14,923,465 | | 2021 | 14,420,972 | | 2020 | 13,944,346 | | 2019 | 13,487,625 | | 2018 | 13,054,311 | | 2017 | 12,645,766 | | 2016 | 12,246,097 | | 2015 | 11,848,852 | | 2014 | 11,461,956 | | 2013 | 11,079,965 | | 2012 | 10,704,029 | | 2011 | 10,361,982 | | 2010 | 10,059,201 | | 2009 | 9,776,043 | | 2008 | 9,503,999 | | 2007 | 9,250,514 | | 2006 | 8,999,386 | | 2005 | 8,723,853 | | 2004 | 8,421,358 | | 2003 | 8,121,659 | | 2002 | 7,852,547 | | 2001 | 7,619,240 | | 2000 | 7,426,517 | | 1999 | 7,267,410 | | 1998 | 7,112,938 | | 1997 | 6,939,213 | | 1996 | 6,759,514 | | 1995 | 6,580,050 | | 1994 | 6,394,431 | | 1993 | 6,220,607 | | 1992 | 6,070,936 | | 1991 | 5,947,561 | | 1990 | 5,847,490 | | 1989 | 5,740,775 | | 1988 | 5,629,809 | | 1987 | 5,522,705 | | 1986 | 5,410,689 | | 1985 | 5,299,555 | | 1984 | 5,187,317 | | 1983 | 5,072,522 | | 1982 | 4,960,934 | | 1981 | 4,866,198 | | 1980 | 4,778,791 | | 1979 | 4,676,410 | | 1978 | 4,567,038 | | 1977 | 4,463,979 | | 1976 | 4,369,845 | | 1975 | 4,277,594 | | 1974 | 4,185,807 | | 1973 | 4,092,873 | | 1972 | 3,999,695 | | 1971 | 3,907,883 | | 1970 | 3,814,970 | | 1969 | 3,723,954 | | 1968 | 3,638,022 | | 1967 | 3,556,412 | | 1966 | 3,478,299 | | 1965 | 3,403,300 | | 1964 | 3,330,757 | | 1963 | 3,261,522 | | 1962 | 3,195,294 | | 1961 | 3,130,711 | | 1960 | 3,068,599 |
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