| Year | Value | | 2022 | 6,738,656 | | 2021 | 6,632,056 | | 2020 | 6,521,955 | | 2019 | 6,408,115 | | 2018 | 6,291,307 | | 2017 | 6,173,197 | | 2016 | 6,054,660 | | 2015 | 5,937,048 | | 2014 | 5,820,544 | | 2013 | 5,706,707 | | 2012 | 5,595,366 | | 2011 | 5,484,900 | | 2010 | 5,375,270 | | 2009 | 5,266,858 | | 2008 | 5,159,607 | | 2007 | 5,053,924 | | 2006 | 4,953,435 | | 2005 | 4,845,400 | | 2004 | 4,733,654 | | 2003 | 4,631,064 | | 2002 | 4,530,712 | | 2001 | 4,424,587 | | 2000 | 4,315,471 | | 1999 | 4,207,907 | | 1998 | 4,102,012 | | 1997 | 3,999,236 | | 1996 | 3,904,027 | | 1995 | 3,823,934 | | 1994 | 3,764,495 | | 1993 | 3,644,195 | | 1992 | 3,502,420 | | 1991 | 3,427,406 | | 1990 | 3,363,159 | | 1989 | 3,300,034 | | 1988 | 3,237,913 | | 1987 | 3,176,841 | | 1986 | 3,116,923 | | 1985 | 3,058,507 | | 1984 | 3,001,457 | | 1983 | 2,945,765 | | 1982 | 2,891,101 | | 1981 | 2,837,536 | | 1980 | 2,785,778 | | 1979 | 2,736,741 | | 1978 | 2,707,619 | | 1977 | 2,684,914 | | 1976 | 2,661,720 | | 1975 | 2,638,632 | | 1974 | 2,615,436 | | 1973 | 2,591,941 | | 1972 | 2,567,801 | | 1971 | 2,543,374 | | 1970 | 2,518,800 | | 1969 | 2,494,012 | | 1968 | 2,468,849 | | 1967 | 2,443,653 | | 1966 | 2,418,450 | | 1965 | 2,393,343 | | 1964 | 2,368,689 | | 1963 | 2,344,780 | | 1962 | 2,321,783 | | 1961 | 2,299,768 | | 1960 | 2,279,270 |
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