| Year | Value | | 2022 | 12,685,134 | | 2021 | 12,770,524 | | 2020 | 12,882,770 | | 2019 | 12,989,120 | | 2018 | 13,075,215 | | 2017 | 13,064,773 | | 2016 | 12,993,059 | | 2015 | 12,864,214 | | 2014 | 12,668,816 | | 2013 | 12,422,765 | | 2012 | 12,188,802 | | 2011 | 11,977,671 | | 2010 | 11,815,197 | | 2009 | 11,603,432 | | 2008 | 11,404,268 | | 2007 | 11,226,883 | | 2006 | 11,075,576 | | 2005 | 10,963,018 | | 2004 | 10,886,316 | | 2003 | 10,839,797 | | 2002 | 10,779,235 | | 2001 | 10,657,654 | | 2000 | 10,364,201 | | 1999 | 9,990,237 | | 1998 | 9,682,694 | | 1997 | 9,366,454 | | 1996 | 9,127,910 | | 1995 | 9,185,626 | | 1994 | 9,376,608 | | 1993 | 9,469,812 | | 1992 | 9,552,503 | | 1991 | 9,611,509 | | 1990 | 9,566,111 | | 1989 | 9,461,420 | | 1988 | 9,341,394 | | 1987 | 9,250,351 | | 1986 | 9,199,834 | | 1985 | 9,189,457 | | 1984 | 9,202,066 | | 1983 | 9,249,966 | | 1982 | 9,319,453 | | 1981 | 9,357,368 | | 1980 | 9,366,519 | | 1979 | 9,367,896 | | 1978 | 9,379,739 | | 1977 | 9,419,878 | | 1976 | 9,488,259 | | 1975 | 9,549,657 | | 1974 | 9,370,485 | | 1973 | 8,816,232 | | 1972 | 8,095,322 | | 1971 | 7,377,626 | | 1970 | 6,807,733 | | 1969 | 6,754,432 | | 1968 | 7,250,920 | | 1967 | 7,923,990 | | 1966 | 8,552,636 | | 1965 | 9,007,438 | | 1964 | 9,207,215 | | 1963 | 9,225,519 | | 1962 | 9,181,971 | | 1961 | 9,132,391 | | 1960 | 9,058,970 |
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