| Year | Value | | 2019 | 8,683,172 | | 2018 | 8,537,160 | | 2017 | 8,386,320 | | 2016 | 8,237,882 | | 2015 | 8,097,062 | | 2014 | 7,965,754 | | 2013 | 7,842,413 | | 2012 | 7,724,582 | | 2011 | 7,608,326 | | 2010 | 7,490,762 | | 2009 | 7,371,191 | | 2008 | 7,250,590 | | 2007 | 7,129,753 | | 2006 | 7,009,989 | | 2005 | 6,892,165 | | 2004 | 6,776,509 | | 2003 | 6,662,346 | | 2002 | 6,548,517 | | 2001 | 6,433,430 | | 2000 | 6,315,964 | | 1999 | 6,195,760 | | 1998 | 6,073,229 | | 1997 | 5,949,078 | | 1996 | 5,824,363 | | 1995 | 5,699,916 | | 1994 | 5,575,975 | | 1993 | 5,452,486 | | 1992 | 5,329,708 | | 1991 | 5,207,887 | | 1990 | 5,087,227 | | 1989 | 4,967,915 | | 1988 | 4,850,088 | | 1987 | 4,733,910 | | 1986 | 4,619,489 | | 1985 | 4,506,938 | | 1984 | 4,396,344 | | 1983 | 4,287,719 | | 1982 | 4,180,988 | | 1981 | 4,076,001 | | 1980 | 3,972,638 | | 1979 | 3,870,928 | | 1978 | 3,770,895 | | 1977 | 3,672,400 | | 1976 | 3,575,279 | | 1975 | 3,479,436 | | 1974 | 3,384,834 | | 1973 | 3,291,570 | | 1972 | 3,199,856 | | 1971 | 3,109,973 | | 1970 | 3,022,145 | | 1969 | 2,936,453 | | 1968 | 2,852,901 | | 1967 | 2,771,632 | | 1966 | 2,692,774 | | 1965 | 2,616,428 | | 1964 | 2,542,670 | | 1963 | 2,471,468 | | 1962 | 2,402,748 | | 1961 | 2,336,368 | | 1960 | 2,272,217 |
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