| Year | Value | | 2022 | 5,623,074 | | 2021 | 5,520,964 | | 2020 | 5,766,426 | | 2019 | 6,353,011 | | 2018 | 7,078,735 | | 2017 | 7,769,908 | | 2016 | 8,117,965 | | 2015 | 8,100,979 | | 2014 | 7,817,131 | | 2013 | 7,329,673 | | 2012 | 6,845,522 | | 2011 | 6,522,737 | | 2010 | 6,443,597 | | 2009 | 6,589,760 | | 2008 | 6,880,087 | | 2007 | 7,116,325 | | 2006 | 7,234,509 | | 2005 | 7,236,112 | | 2004 | 7,127,719 | | 2003 | 6,937,910 | | 2002 | 6,658,705 | | 2001 | 6,316,190 | | 2000 | 5,907,908 | | 1999 | 5,486,070 | | 1998 | 5,086,142 | | 1997 | 4,705,191 | | 1996 | 4,407,572 | | 1995 | 4,304,298 | | 1994 | 4,408,213 | | 1993 | 4,630,855 | | 1992 | 4,995,837 | | 1991 | 5,420,195 | | 1990 | 5,703,286 | | 1989 | 5,758,451 | | 1988 | 5,674,357 | | 1987 | 5,536,651 | | 1986 | 5,367,750 | | 1985 | 5,232,414 | | 1984 | 5,098,415 | | 1983 | 4,987,982 | | 1982 | 4,884,176 | | 1981 | 4,766,177 | | 1980 | 4,643,359 | | 1979 | 4,490,468 | | 1978 | 4,258,201 | | 1977 | 3,999,435 | | 1976 | 3,768,554 | | 1975 | 3,554,541 | | 1974 | 3,374,440 | | 1973 | 3,245,252 | | 1972 | 3,131,260 | | 1971 | 2,987,955 | | 1970 | 2,868,001 | | 1969 | 2,794,974 | | 1968 | 2,761,698 | | 1967 | 2,734,512 | | 1966 | 2,693,220 | | 1965 | 2,651,809 | | 1964 | 2,598,531 | | 1963 | 2,477,578 | | 1962 | 2,361,151 | | 1961 | 2,282,173 | | 1960 | 2,180,353 |
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