Year | Value | 2022 | 19,603,733 | 2021 | 19,493,184 | 2020 | 19,300,315 | 2019 | 19,039,485 | 2018 | 18,701,450 | 2017 | 18,368,577 | 2016 | 18,083,879 | 2015 | 17,870,124 | 2014 | 17,687,108 | 2013 | 17,509,925 | 2012 | 17,341,771 | 2011 | 17,173,573 | 2010 | 17,004,162 | 2009 | 16,833,447 | 2008 | 16,661,462 | 2007 | 16,495,538 | 2006 | 16,334,575 | 2005 | 16,175,311 | 2004 | 16,017,966 | 2003 | 15,859,112 | 2002 | 15,693,790 | 2001 | 15,523,978 | 2000 | 15,351,799 | 1999 | 15,176,410 | 1998 | 14,996,742 | 1997 | 14,809,289 | 1996 | 14,615,483 | 1995 | 14,416,796 | 1994 | 14,210,674 | 1993 | 13,998,386 | 1992 | 13,782,297 | 1991 | 13,561,945 | 1990 | 13,342,868 | 1989 | 13,128,619 | 1988 | 12,918,389 | 1987 | 12,712,784 | 1986 | 12,514,502 | 1985 | 12,326,396 | 1984 | 12,147,758 | 1983 | 11,976,513 | 1982 | 11,807,408 | 1981 | 11,637,613 | 1980 | 11,469,828 | 1979 | 11,304,331 | 1978 | 11,137,748 | 1977 | 10,969,861 | 1976 | 10,804,869 | 1975 | 10,639,531 | 1974 | 10,472,743 | 1973 | 10,307,842 | 1972 | 10,145,765 | 1971 | 9,984,378 | 1970 | 9,820,481 | 1969 | 9,656,299 | 1968 | 9,491,502 | 1967 | 9,326,268 | 1966 | 9,161,649 | 1965 | 8,994,936 | 1964 | 8,825,046 | 1963 | 8,656,006 | 1962 | 8,486,120 | 1961 | 8,313,535 | 1960 | 8,141,820 |
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