| Year | Value | | 2022 | 9,946,658 | | 2021 | 10,033,514 | | 2020 | 10,280,074 | | 2019 | 10,436,114 | | 2018 | 10,577,969 | | 2017 | 10,651,088 | | 2016 | 10,613,869 | | 2015 | 10,521,101 | | 2014 | 10,507,640 | | 2013 | 10,603,670 | | 2012 | 10,743,942 | | 2011 | 10,908,218 | | 2010 | 11,087,358 | | 2009 | 11,183,622 | | 2008 | 11,199,871 | | 2007 | 11,190,733 | | 2006 | 11,144,398 | | 2005 | 11,029,852 | | 2004 | 10,883,395 | | 2003 | 10,706,969 | | 2002 | 10,461,967 | | 2001 | 10,359,563 | | 2000 | 10,126,185 | | 1999 | 9,587,409 | | 1998 | 9,168,179 | | 1997 | 8,928,344 | | 1996 | 8,570,354 | | 1995 | 8,191,108 | | 1994 | 7,961,095 | | 1993 | 7,719,321 | | 1992 | 7,405,007 | | 1991 | 6,936,072 | | 1990 | 6,626,785 | | 1989 | 6,523,215 | | 1988 | 6,325,130 | | 1987 | 6,073,662 | | 1986 | 5,975,002 | | 1985 | 5,888,919 | | 1984 | 5,721,204 | | 1983 | 5,669,580 | | 1982 | 5,688,307 | | 1981 | 5,719,384 | | 1980 | 5,863,150 | | 1979 | 6,174,985 | | 1978 | 6,343,498 | | 1977 | 6,363,840 | | 1976 | 6,384,675 | | 1975 | 6,265,170 | | 1974 | 5,980,005 | | 1973 | 5,889,413 | | 1972 | 5,924,693 | | 1971 | 5,819,729 | | 1970 | 5,808,801 | | 1969 | 5,938,969 | | 1968 | 5,840,928 | | 1967 | 5,602,803 | | 1966 | 5,548,626 | | 1965 | 5,491,579 | | 1964 | 5,354,081 | | 1963 | 5,287,843 | | 1962 | 5,339,495 | | 1961 | 5,382,500 | | 1960 | 5,388,026 |
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