Year | Value | 2022 | 42,303,827 | 2021 | 42,163,954 | 2020 | 41,978,252 | 2019 | 41,882,467 | 2018 | 41,922,047 | 2017 | 41,878,159 | 2016 | 41,952,930 | 2015 | 41,999,012 | 2014 | 41,754,162 | 2013 | 41,365,096 | 2012 | 40,987,403 | 2011 | 40,603,864 | 2010 | 40,223,081 | 2009 | 39,714,841 | 2008 | 39,133,022 | 2007 | 38,522,253 | 2006 | 38,100,151 | 2005 | 37,631,898 | 2004 | 37,065,665 | 2003 | 36,794,919 | 2002 | 36,753,111 | 2001 | 36,274,654 | 2000 | 35,127,075 | 1999 | 33,852,316 | 1998 | 32,569,257 | 1997 | 31,119,032 | 1996 | 29,874,571 | 1995 | 29,431,194 | 1994 | 29,280,853 | 1993 | 28,861,042 | 1992 | 28,441,694 | 1991 | 28,152,798 | 1990 | 27,857,091 | 1989 | 27,561,178 | 1988 | 27,287,162 | 1987 | 27,073,891 | 1986 | 26,926,245 | 1985 | 26,854,837 | 1984 | 26,909,909 | 1983 | 27,005,085 | 1982 | 27,062,064 | 1981 | 27,110,613 | 1980 | 27,095,637 | 1979 | 26,947,517 | 1978 | 26,948,520 | 1977 | 27,042,230 | 1976 | 26,936,399 | 1975 | 26,830,967 | 1974 | 26,493,697 | 1973 | 25,357,442 | 1972 | 23,845,350 | 1971 | 22,577,472 | 1970 | 21,505,525 | 1969 | 21,142,777 | 1968 | 21,686,103 | 1967 | 22,602,887 | 1966 | 23,412,582 | 1965 | 23,938,658 | 1964 | 24,075,448 | 1963 | 23,920,296 | 1962 | 23,631,592 | 1961 | 23,217,118 | 1960 | 22,773,231 |
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