| Year | Value | | 2022 | 12,889,576 | | 2021 | 12,551,213 | | 2020 | 12,220,227 | | 2019 | 11,874,838 | | 2018 | 11,493,472 | | 2017 | 11,155,593 | | 2016 | 10,903,327 | | 2015 | 10,727,148 | | 2014 | 10,494,913 | | 2013 | 10,149,577 | | 2012 | 9,795,479 | | 2011 | 9,455,733 | | 2010 | 9,126,605 | | 2009 | 8,709,366 | | 2008 | 8,278,109 | | 2007 | 7,944,609 | | 2006 | 7,658,190 | | 2005 | 7,388,874 | | 2004 | 7,120,496 | | 2003 | 6,860,846 | | 2002 | 6,648,938 | | 2001 | 6,465,729 | | 2000 | 6,307,659 | | 1999 | 6,180,180 | | 1998 | 6,035,340 | | 1997 | 5,923,862 | | 1996 | 5,930,507 | | 1995 | 5,932,783 | | 1994 | 5,586,408 | | 1993 | 5,555,220 | | 1992 | 5,743,085 | | 1991 | 5,594,828 | | 1990 | 5,483,793 | | 1989 | 5,373,697 | | 1988 | 5,271,840 | | 1987 | 5,157,769 | | 1986 | 5,041,706 | | 1985 | 4,948,024 | | 1984 | 4,842,268 | | 1983 | 4,726,506 | | 1982 | 4,602,271 | | 1981 | 4,490,743 | | 1980 | 4,312,834 | | 1979 | 4,137,437 | | 1978 | 4,039,410 | | 1977 | 3,927,428 | | 1976 | 3,830,889 | | 1975 | 3,749,232 | | 1974 | 3,660,032 | | 1973 | 3,571,450 | | 1972 | 3,579,195 | | 1971 | 3,582,070 | | 1970 | 3,497,834 | | 1969 | 3,424,429 | | 1968 | 3,352,397 | | 1967 | 3,274,493 | | 1966 | 3,193,378 | | 1965 | 3,118,134 | | 1964 | 3,033,221 | | 1963 | 2,948,133 | | 1962 | 2,887,398 | | 1961 | 2,815,972 | | 1960 | 2,746,628 |
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