Year | Value | 2022 | 43,501,910 | 2021 | 43,453,624 | 2020 | 43,396,127 | 2019 | 42,897,171 | 2018 | 42,289,051 | 2017 | 41,668,901 | 2016 | 41,033,243 | 2015 | 40,320,323 | 2014 | 39,591,310 | 2013 | 38,887,559 | 2012 | 38,175,681 | 2011 | 37,633,344 | 2010 | 37,167,971 | 2009 | 36,610,864 | 2008 | 36,297,263 | 2007 | 36,166,672 | 2006 | 35,687,079 | 2005 | 34,566,598 | 2004 | 33,258,073 | 2003 | 31,934,479 | 2002 | 30,528,413 | 2001 | 29,280,258 | 2000 | 28,763,636 | 1999 | 28,562,536 | 1998 | 28,082,061 | 1997 | 27,595,280 | 1996 | 27,274,799 | 1995 | 26,908,531 | 1994 | 26,463,449 | 1993 | 26,129,990 | 1992 | 25,860,561 | 1991 | 25,621,173 | 1990 | 25,508,854 | 1989 | 25,605,303 | 1988 | 25,662,512 | 1987 | 25,604,583 | 1986 | 25,434,931 | 1985 | 25,023,241 | 1984 | 24,398,839 | 1983 | 23,907,255 | 1982 | 23,525,396 | 1981 | 23,082,733 | 1980 | 22,800,685 | 1979 | 22,458,930 | 1978 | 21,516,363 | 1977 | 20,288,694 | 1976 | 19,280,934 | 1975 | 18,423,007 | 1974 | 18,044,909 | 1973 | 18,425,362 | 1972 | 19,176,150 | 1971 | 19,876,679 | 1970 | 20,354,376 | 1969 | 20,590,556 | 1968 | 20,605,851 | 1967 | 20,528,222 | 1966 | 20,343,193 | 1965 | 20,117,439 | 1964 | 19,858,709 | 1963 | 19,505,141 | 1962 | 19,186,192 | 1961 | 18,931,072 | 1960 | 18,631,458 |
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