| Year | Value | | 2022 | 6,336,392 | | 2021 | 6,314,167 | | 2020 | 6,292,731 | | 2019 | 6,280,217 | | 2018 | 6,276,342 | | 2017 | 6,266,654 | | 2016 | 6,250,510 | | 2015 | 6,231,066 | | 2014 | 6,209,526 | | 2013 | 6,185,642 | | 2012 | 6,161,289 | | 2011 | 6,137,349 | | 2010 | 6,114,034 | | 2009 | 6,091,188 | | 2008 | 6,068,099 | | 2007 | 6,044,131 | | 2006 | 6,034,436 | | 2005 | 6,037,817 | | 2004 | 6,035,655 | | 2003 | 6,026,849 | | 2002 | 6,011,275 | | 2001 | 5,988,095 | | 2000 | 5,958,482 | | 1999 | 5,923,852 | | 1998 | 5,885,083 | | 1997 | 5,842,638 | | 1996 | 5,797,140 | | 1995 | 5,748,195 | | 1994 | 5,693,038 | | 1993 | 5,630,987 | | 1992 | 5,552,206 | | 1991 | 5,461,070 | | 1990 | 5,367,179 | | 1989 | 5,270,825 | | 1988 | 5,170,440 | | 1987 | 5,067,200 | | 1986 | 4,970,788 | | 1985 | 4,876,757 | | 1984 | 4,782,219 | | 1983 | 4,689,680 | | 1982 | 4,599,904 | | 1981 | 4,549,173 | | 1980 | 4,508,992 | | 1979 | 4,433,041 | | 1978 | 4,346,522 | | 1977 | 4,256,699 | | 1976 | 4,166,890 | | 1975 | 4,076,751 | | 1974 | 3,984,049 | | 1973 | 3,890,639 | | 1972 | 3,798,109 | | 1971 | 3,708,010 | | 1970 | 3,619,090 | | 1969 | 3,530,958 | | 1968 | 3,443,251 | | 1967 | 3,354,611 | | 1966 | 3,266,436 | | 1965 | 3,179,506 | | 1964 | 3,095,170 | | 1963 | 3,014,885 | | 1962 | 2,937,821 | | 1961 | 2,858,896 | | 1960 | 2,779,327 |
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