| Year | Value | | 2022 | 15,483,335 | | 2021 | 14,911,913 | | 2020 | 14,362,869 | | 2019 | 13,828,715 | | 2018 | 13,312,700 | | 2017 | 12,806,392 | | 2016 | 12,311,051 | | 2015 | 11,845,290 | | 2014 | 11,407,025 | | 2013 | 10,994,273 | | 2012 | 10,618,264 | | 2011 | 10,267,456 | | 2010 | 9,942,612 | | 2009 | 9,635,604 | | 2008 | 9,334,978 | | 2007 | 9,054,053 | | 2006 | 8,787,672 | | 2005 | 8,525,661 | | 2004 | 8,278,606 | | 2003 | 8,045,883 | | 2002 | 7,819,988 | | 2001 | 7,608,528 | | 2000 | 7,415,706 | | 1999 | 7,210,549 | | 1998 | 6,992,856 | | 1997 | 6,804,847 | | 1996 | 6,640,009 | | 1995 | 6,473,741 | | 1994 | 6,327,130 | | 1993 | 6,190,323 | | 1992 | 6,023,004 | | 1991 | 5,851,145 | | 1990 | 5,704,115 | | 1989 | 5,562,865 | | 1988 | 5,437,662 | | 1987 | 5,330,855 | | 1986 | 5,225,143 | | 1985 | 5,122,963 | | 1984 | 5,021,739 | | 1983 | 4,919,870 | | 1982 | 4,821,753 | | 1981 | 4,744,515 | | 1980 | 4,689,974 | | 1979 | 4,627,733 | | 1978 | 4,543,019 | | 1977 | 4,458,830 | | 1976 | 4,379,678 | | 1975 | 4,293,232 | | 1974 | 4,202,929 | | 1973 | 4,111,174 | | 1972 | 4,021,008 | | 1971 | 3,932,401 | | 1970 | 3,843,675 | | 1969 | 3,758,039 | | 1968 | 3,672,798 | | 1967 | 3,587,719 | | 1966 | 3,506,971 | | 1965 | 3,429,643 | | 1964 | 3,354,852 | | 1963 | 3,286,495 | | 1962 | 3,223,597 | | 1961 | 3,161,806 | | 1960 | 3,099,268 |
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