| Year | Value | | 2022 | 12,033,999 | | 2021 | 11,679,113 | | 2020 | 11,317,100 | | 2019 | 10,951,429 | | 2018 | 10,578,229 | | 2017 | 10,203,578 | | 2016 | 9,854,256 | | 2015 | 9,540,775 | | 2014 | 9,258,699 | | 2013 | 9,002,435 | | 2012 | 8,755,407 | | 2011 | 8,503,199 | | 2010 | 8,253,159 | | 2009 | 8,016,927 | | 2008 | 7,795,177 | | 2007 | 7,589,685 | | 2006 | 7,408,138 | | 2005 | 7,251,925 | | 2004 | 7,115,664 | | 2003 | 7,001,919 | | 2002 | 6,901,646 | | 2001 | 6,796,539 | | 2000 | 6,682,115 | | 1999 | 6,554,592 | | 1998 | 6,411,479 | | 1997 | 6,253,779 | | 1996 | 6,083,849 | | 1995 | 5,903,173 | | 1994 | 5,709,208 | | 1993 | 5,500,225 | | 1992 | 5,287,985 | | 1991 | 5,083,733 | | 1990 | 4,881,254 | | 1989 | 4,682,006 | | 1988 | 4,499,805 | | 1987 | 4,336,040 | | 1986 | 4,189,344 | | 1985 | 4,059,927 | | 1984 | 3,943,280 | | 1983 | 3,849,506 | | 1982 | 3,763,289 | | 1981 | 3,665,061 | | 1980 | 3,562,939 | | 1979 | 3,458,485 | | 1978 | 3,356,541 | | 1977 | 3,256,799 | | 1976 | 3,161,768 | | 1975 | 3,073,344 | | 1974 | 2,990,082 | | 1973 | 2,912,228 | | 1972 | 2,838,318 | | 1971 | 2,768,661 | | 1970 | 2,701,869 | | 1969 | 2,628,850 | | 1968 | 2,560,615 | | 1967 | 2,520,094 | | 1966 | 2,500,298 | | 1965 | 2,486,726 | | 1964 | 2,485,472 | | 1963 | 2,483,991 | | 1962 | 2,456,694 | | 1961 | 2,409,002 | | 1960 | 2,355,247 |
|