| Year | Value | | 2022 | 13,380,838 | | 2021 | 13,441,419 | | 2020 | 13,442,564 | | 2019 | 13,123,177 | | 2018 | 12,629,240 | | 2017 | 12,116,851 | | 2016 | 11,630,557 | | 2015 | 11,180,727 | | 2014 | 10,755,676 | | 2013 | 10,357,071 | | 2012 | 9,989,316 | | 2011 | 9,636,098 | | 2010 | 9,299,394 | | 2009 | 8,985,489 | | 2008 | 8,679,711 | | 2007 | 8,382,245 | | 2006 | 8,083,359 | | 2005 | 7,781,462 | | 2004 | 7,481,993 | | 2003 | 7,188,295 | | 2002 | 6,900,313 | | 2001 | 6,614,793 | | 2000 | 6,331,669 | | 1999 | 6,053,451 | | 1998 | 5,793,179 | | 1997 | 5,559,406 | | 1996 | 5,351,825 | | 1995 | 5,168,274 | | 1994 | 5,001,914 | | 1993 | 4,850,144 | | 1992 | 4,716,738 | | 1991 | 4,591,350 | | 1990 | 4,467,443 | | 1989 | 4,344,043 | | 1988 | 4,218,353 | | 1987 | 4,089,861 | | 1986 | 3,963,787 | | 1985 | 3,844,371 | | 1984 | 3,733,514 | | 1983 | 3,630,935 | | 1982 | 3,530,046 | | 1981 | 3,427,150 | | 1980 | 3,317,617 | | 1979 | 3,185,849 | | 1978 | 3,034,731 | | 1977 | 2,882,651 | | 1976 | 2,739,328 | | 1975 | 2,604,903 | | 1974 | 2,477,675 | | 1973 | 2,369,685 | | 1972 | 2,282,467 | | 1971 | 2,213,138 | | 1970 | 2,146,338 | | 1969 | 2,065,642 | | 1968 | 1,973,287 | | 1967 | 1,877,679 | | 1966 | 1,791,594 | | 1965 | 1,721,989 | | 1964 | 1,666,950 | | 1963 | 1,630,306 | | 1962 | 1,614,492 | | 1961 | 1,610,735 | | 1960 | 1,607,732 |
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