| Year | Value | | 2022 | 17,316,449 | | 2021 | 16,876,720 | | 2020 | 16,436,120 | | 2019 | 16,000,781 | | 2018 | 15,574,909 | | 2017 | 15,157,793 | | 2016 | 14,751,356 | | 2015 | 14,356,181 | | 2014 | 13,970,308 | | 2013 | 13,595,566 | | 2012 | 13,231,833 | | 2011 | 12,875,880 | | 2010 | 12,530,121 | | 2009 | 12,195,029 | | 2008 | 11,872,929 | | 2007 | 11,563,869 | | 2006 | 11,263,387 | | 2005 | 10,974,057 | | 2004 | 10,698,691 | | 2003 | 10,434,504 | | 2002 | 10,180,950 | | 2001 | 9,938,027 | | 2000 | 9,704,287 | | 1999 | 9,478,564 | | 1998 | 9,261,526 | | 1997 | 9,051,539 | | 1996 | 8,843,423 | | 1995 | 8,632,681 | | 1994 | 8,416,997 | | 1993 | 8,196,551 | | 1992 | 7,974,514 | | 1991 | 7,754,289 | | 1990 | 7,536,001 | | 1989 | 7,321,832 | | 1988 | 7,113,636 | | 1987 | 6,909,837 | | 1986 | 6,710,885 | | 1985 | 6,520,705 | | 1984 | 6,341,801 | | 1983 | 6,171,874 | | 1982 | 6,008,392 | | 1981 | 5,852,029 | | 1980 | 5,703,869 | | 1979 | 5,564,474 | | 1978 | 5,433,225 | | 1977 | 5,308,297 | | 1976 | 5,181,195 | | 1975 | 5,047,922 | | 1974 | 4,911,421 | | 1973 | 4,772,039 | | 1972 | 4,633,452 | | 1971 | 4,498,616 | | 1970 | 4,367,744 | | 1969 | 4,240,859 | | 1968 | 4,117,659 | | 1967 | 3,997,869 | | 1966 | 3,881,994 | | 1965 | 3,770,874 | | 1964 | 3,664,599 | | 1963 | 3,562,469 | | 1962 | 3,463,524 | | 1961 | 3,367,082 | | 1960 | 3,273,177 |
|