| Year | Value | | 2022 | 24,025,884 | | 2021 | 22,862,550 | | 2020 | 21,736,651 | | 2019 | 20,656,040 | | 2018 | 19,620,628 | | 2017 | 18,597,942 | | 2016 | 17,589,735 | | 2015 | 16,612,464 | | 2014 | 15,703,729 | | 2013 | 14,872,630 | | 2012 | 14,093,565 | | 2011 | 13,366,889 | | 2010 | 12,682,374 | | 2009 | 12,061,617 | | 2008 | 11,479,108 | | 2007 | 10,896,766 | | 2006 | 10,334,400 | | 2005 | 9,798,745 | | 2004 | 9,292,156 | | 2003 | 8,814,911 | | 2002 | 8,377,308 | | 2001 | 8,029,877 | | 2000 | 7,688,508 | | 1999 | 7,352,195 | | 1998 | 7,044,061 | | 1997 | 6,750,360 | | 1996 | 6,504,676 | | 1995 | 6,277,955 | | 1994 | 5,979,749 | | 1993 | 5,655,940 | | 1992 | 5,388,170 | | 1991 | 5,165,205 | | 1990 | 4,948,743 | | 1989 | 4,738,326 | | 1988 | 4,526,852 | | 1987 | 4,271,621 | | 1986 | 4,021,337 | | 1985 | 3,784,249 | | 1984 | 3,563,813 | | 1983 | 3,355,770 | | 1982 | 3,158,833 | | 1981 | 2,978,866 | | 1980 | 2,808,774 | | 1979 | 2,644,174 | | 1978 | 2,469,548 | | 1977 | 2,229,480 | | 1976 | 2,010,062 | | 1975 | 1,810,537 | | 1974 | 1,630,287 | | 1973 | 1,467,585 | | 1972 | 1,320,619 | | 1971 | 1,188,115 | | 1970 | 1,069,300 | | 1969 | 962,697 | | 1968 | 866,827 | | 1967 | 786,829 | | 1966 | 742,760 | | 1965 | 701,325 | | 1964 | 662,132 | | 1963 | 625,168 | | 1962 | 590,457 | | 1961 | 557,626 | | 1960 | 526,827 |
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