| Year | Value | | 2022 | 17,023,203 | | 2021 | 16,668,432 | | 2020 | 16,320,979 | | 2019 | 15,953,578 | | 2018 | 15,578,957 | | 2017 | 15,202,496 | | 2016 | 14,820,156 | | 2015 | 14,439,156 | | 2014 | 14,052,916 | | 2013 | 13,660,800 | | 2012 | 13,273,109 | | 2011 | 12,891,995 | | 2010 | 12,518,994 | | 2009 | 12,154,813 | | 2008 | 11,797,215 | | 2007 | 11,446,120 | | 2006 | 11,101,550 | | 2005 | 10,771,739 | | 2004 | 10,470,934 | | 2003 | 10,191,642 | | 2002 | 9,920,754 | | 2001 | 9,655,431 | | 2000 | 9,391,539 | | 1999 | 9,128,106 | | 1998 | 8,868,676 | | 1997 | 8,612,819 | | 1996 | 8,359,588 | | 1995 | 8,097,967 | | 1994 | 7,817,072 | | 1993 | 7,528,738 | | 1992 | 7,245,593 | | 1991 | 6,971,041 | | 1990 | 6,705,257 | | 1989 | 6,448,548 | | 1988 | 6,201,065 | | 1987 | 5,960,682 | | 1986 | 5,734,043 | | 1985 | 5,518,354 | | 1984 | 5,308,819 | | 1983 | 5,111,056 | | 1982 | 4,924,875 | | 1981 | 4,749,731 | | 1980 | 4,584,436 | | 1979 | 4,429,023 | | 1978 | 4,284,108 | | 1977 | 4,148,313 | | 1976 | 4,020,077 | | 1975 | 3,899,166 | | 1974 | 3,785,374 | | 1973 | 3,678,407 | | 1972 | 3,577,052 | | 1971 | 3,481,051 | | 1970 | 3,391,008 | | 1969 | 3,307,037 | | 1968 | 3,229,495 | | 1967 | 3,157,767 | | 1966 | 3,090,505 | | 1965 | 3,027,525 | | 1964 | 2,968,527 | | 1963 | 2,915,350 | | 1962 | 2,865,985 | | 1961 | 2,815,795 | | 1960 | 2,766,233 |
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