| Year | Value | | 2022 | 12,452,462 | | 2021 | 12,364,030 | | 2020 | 12,264,656 | | 2019 | 12,182,616 | | 2018 | 12,142,798 | | 2017 | 12,079,696 | | 2016 | 11,953,720 | | 2015 | 11,606,225 | | 2014 | 11,131,791 | | 2013 | 10,696,557 | | 2012 | 10,246,987 | | 2011 | 9,882,206 | | 2010 | 9,882,241 | | 2009 | 10,011,447 | | 2008 | 10,044,787 | | 2007 | 10,094,597 | | 2006 | 10,129,484 | | 2005 | 10,050,475 | | 2004 | 9,909,149 | | 2003 | 9,762,609 | | 2002 | 9,633,156 | | 2001 | 9,546,446 | | 2000 | 9,499,399 | | 1999 | 9,463,930 | | 1998 | 9,447,655 | | 1997 | 9,424,758 | | 1996 | 9,331,768 | | 1995 | 9,177,195 | | 1994 | 8,988,152 | | 1993 | 8,800,604 | | 1992 | 8,639,316 | | 1991 | 8,529,335 | | 1990 | 8,420,599 | | 1989 | 8,174,011 | | 1988 | 7,657,769 | | 1987 | 6,999,463 | | 1986 | 6,366,319 | | 1985 | 5,861,784 | | 1984 | 5,763,792 | | 1983 | 6,150,184 | | 1982 | 6,748,304 | | 1981 | 7,315,034 | | 1980 | 7,740,861 | | 1979 | 7,955,277 | | 1978 | 7,999,864 | | 1977 | 7,984,821 | | 1976 | 7,959,290 | | 1975 | 7,922,241 | | 1974 | 7,852,193 | | 1973 | 7,765,789 | | 1972 | 7,679,025 | | 1971 | 7,590,787 | | 1970 | 7,490,619 | | 1969 | 7,343,722 | | 1968 | 7,142,026 | | 1967 | 6,900,912 | | 1966 | 6,632,805 | | 1965 | 6,346,802 | | 1964 | 6,071,202 | | 1963 | 5,850,278 | | 1962 | 5,657,298 | | 1961 | 5,477,638 | | 1960 | 5,333,539 |
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