| Year | Value | | 2022 | 3,844,363 | | 2021 | 4,026,530 | | 2020 | 4,261,722 | | 2019 | 4,502,419 | | 2018 | 4,686,180 | | 2017 | 4,815,784 | | 2016 | 4,846,296 | | 2015 | 4,750,525 | | 2014 | 4,619,264 | | 2013 | 4,503,969 | | 2012 | 4,368,361 | | 2011 | 4,203,640 | | 2010 | 4,087,555 | | 2009 | 3,993,061 | | 2008 | 3,869,282 | | 2007 | 3,757,140 | | 2006 | 3,662,799 | | 2005 | 3,582,230 | | 2004 | 3,477,022 | | 2003 | 3,358,716 | | 2002 | 3,316,588 | | 2001 | 3,368,312 | | 2000 | 3,465,004 | | 1999 | 3,584,719 | | 1998 | 3,697,868 | | 1997 | 3,817,435 | | 1996 | 3,983,142 | | 1995 | 4,205,466 | | 1994 | 4,481,225 | | 1993 | 4,819,933 | | 1992 | 5,230,928 | | 1991 | 5,618,617 | | 1990 | 5,888,366 | | 1989 | 6,084,389 | | 1988 | 6,187,166 | | 1987 | 6,174,427 | | 1986 | 6,070,211 | | 1985 | 5,959,666 | | 1984 | 5,844,835 | | 1983 | 5,693,489 | | 1982 | 5,562,308 | | 1981 | 5,483,083 | | 1980 | 5,427,746 | | 1979 | 5,384,491 | | 1978 | 5,349,177 | | 1977 | 5,310,509 | | 1976 | 5,255,385 | | 1975 | 5,169,607 | | 1974 | 5,061,310 | | 1973 | 4,952,259 | | 1972 | 4,855,810 | | 1971 | 4,799,371 | | 1970 | 4,772,545 | | 1969 | 4,819,538 | | 1968 | 5,006,674 | | 1967 | 5,276,881 | | 1966 | 5,594,204 | | 1965 | 5,949,339 | | 1964 | 6,266,157 | | 1963 | 6,497,970 | | 1962 | 6,647,506 | | 1961 | 6,724,177 | | 1960 | 6,748,462 |
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