Year | Value | 2022 | 39,787,075 | 2021 | 39,257,245 | 2020 | 38,717,824 | 2019 | 38,003,163 | 2018 | 37,317,781 | 2017 | 36,607,927 | 2016 | 36,062,773 | 2015 | 35,492,207 | 2014 | 34,890,023 | 2013 | 34,561,685 | 2012 | 34,443,671 | 2011 | 33,998,193 | 2010 | 32,990,394 | 2009 | 31,746,949 | 2008 | 30,467,755 | 2007 | 29,093,708 | 2006 | 27,876,066 | 2005 | 27,363,573 | 2004 | 27,151,661 | 2003 | 26,662,469 | 2002 | 26,160,894 | 2001 | 25,816,182 | 2000 | 25,430,901 | 1999 | 24,988,633 | 1998 | 24,645,835 | 1997 | 24,360,972 | 1996 | 24,108,892 | 1995 | 23,982,836 | 1994 | 24,025,091 | 1993 | 24,026,643 | 1992 | 23,915,997 | 1991 | 23,687,215 | 1990 | 23,224,709 | 1989 | 22,596,874 | 1988 | 22,087,245 | 1987 | 21,690,221 | 1986 | 21,245,851 | 1985 | 20,945,940 | 1984 | 20,599,792 | 1983 | 19,740,928 | 1982 | 18,651,266 | 1981 | 17,747,056 | 1980 | 16,954,262 | 1979 | 16,592,164 | 1978 | 16,907,990 | 1977 | 17,567,643 | 1976 | 18,172,181 | 1975 | 18,592,171 | 1974 | 18,758,307 | 1973 | 18,724,739 | 1972 | 18,605,938 | 1971 | 18,400,470 | 1970 | 18,144,829 | 1969 | 17,890,519 | 1968 | 17,546,949 | 1967 | 17,237,635 | 1966 | 16,987,383 | 1965 | 16,700,841 | 1964 | 16,376,238 | 1963 | 16,071,031 | 1962 | 15,683,371 | 1961 | 15,214,309 | 1960 | 14,770,036 |
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