| Year | Value | | 2022 | 6,597,742 | | 2021 | 6,127,512 | | 2020 | 5,818,511 | | 2019 | 5,618,357 | | 2018 | 5,405,571 | | 2017 | 5,183,829 | | 2016 | 5,033,969 | | 2015 | 4,915,192 | | 2014 | 4,802,214 | | 2013 | 4,716,701 | | 2012 | 4,655,445 | | 2011 | 4,606,796 | | 2010 | 4,568,115 | | 2009 | 4,586,107 | | 2008 | 4,610,194 | | 2007 | 4,622,407 | | 2006 | 4,675,237 | | 2005 | 4,706,297 | | 2004 | 4,670,097 | | 2003 | 4,727,216 | | 2002 | 4,810,010 | | 2001 | 4,755,880 | | 2000 | 4,735,595 | | 1999 | 4,774,019 | | 1998 | 4,657,876 | | 1997 | 4,479,637 | | 1996 | 4,400,620 | | 1995 | 4,305,458 | | 1994 | 4,183,932 | | 1993 | 4,130,946 | | 1992 | 4,142,114 | | 1991 | 4,131,241 | | 1990 | 4,095,575 | | 1989 | 4,045,445 | | 1988 | 3,981,685 | | 1987 | 3,898,434 | | 1986 | 3,768,278 | | 1985 | 3,649,107 | | 1984 | 3,559,837 | | 1983 | 3,447,610 | | 1982 | 3,357,673 | | 1981 | 3,292,058 | | 1980 | 3,196,907 | | 1979 | 3,109,466 | | 1978 | 3,061,330 | | 1977 | 2,989,815 | | 1976 | 2,906,483 | | 1975 | 2,854,915 | | 1974 | 2,791,138 | | 1973 | 2,700,437 | | 1972 | 2,600,346 | | 1971 | 2,519,726 | | 1970 | 2,446,135 | | 1969 | 2,385,720 | | 1968 | 2,347,532 | | 1967 | 2,314,937 | | 1966 | 2,256,154 | | 1965 | 2,182,856 | | 1964 | 2,116,286 | | 1963 | 2,051,741 | | 1962 | 1,989,298 | | 1961 | 1,924,635 | | 1960 | 1,854,936 |
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