| Year | Value | | 2022 | 12,560,283 | | 2021 | 11,968,088 | | 2020 | 11,523,597 | | 2019 | 11,018,062 | | 2018 | 10,471,390 | | 2017 | 10,156,105 | | 2016 | 10,019,763 | | 2015 | 10,018,957 | | 2014 | 10,337,199 | | 2013 | 11,291,540 | | 2012 | 12,106,417 | | 2011 | 12,406,434 | | 2010 | 12,419,685 | | 2009 | 12,056,702 | | 2008 | 11,783,890 | | 2007 | 11,285,415 | | 2006 | 10,521,656 | | 2005 | 9,994,609 | | 2004 | 9,659,934 | | 2003 | 9,342,648 | | 2002 | 9,042,350 | | 2001 | 8,751,059 | | 2000 | 8,471,337 | | 1999 | 8,201,521 | | 1998 | 7,937,828 | | 1997 | 7,679,023 | | 1996 | 7,424,012 | | 1995 | 7,171,611 | | 1994 | 6,928,456 | | 1993 | 6,708,290 | | 1992 | 6,492,292 | | 1991 | 6,281,085 | | 1990 | 6,071,846 | | 1989 | 5,863,373 | | 1988 | 5,655,768 | | 1987 | 5,449,564 | | 1986 | 5,246,456 | | 1985 | 5,048,155 | | 1984 | 4,855,728 | | 1983 | 4,669,483 | | 1982 | 4,495,543 | | 1981 | 4,329,206 | | 1980 | 4,156,523 | | 1979 | 3,988,768 | | 1978 | 3,826,689 | | 1977 | 3,670,841 | | 1976 | 3,521,662 | | 1975 | 3,378,280 | | 1974 | 3,240,862 | | 1973 | 3,109,733 | | 1972 | 2,983,439 | | 1971 | 2,860,671 | | 1970 | 2,739,057 | | 1969 | 2,607,780 | | 1968 | 2,483,399 | | 1967 | 2,365,557 | | 1966 | 2,253,766 | | 1965 | 2,147,703 | | 1964 | 2,047,268 | | 1963 | 1,952,207 | | 1962 | 1,862,252 | | 1961 | 1,777,026 | | 1960 | 1,697,065 |
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