Year | Value | 2022 | 30,848,829 | 2021 | 30,380,961 | 2020 | 30,340,882 | 2019 | 30,118,272 | 2018 | 29,360,603 | 2017 | 28,592,972 | 2016 | 27,869,503 | 2015 | 27,241,324 | 2014 | 26,651,368 | 2013 | 26,048,619 | 2012 | 25,433,937 | 2011 | 24,814,831 | 2010 | 24,142,488 | 2009 | 23,318,830 | 2008 | 22,402,324 | 2007 | 21,496,783 | 2006 | 20,611,906 | 2005 | 19,756,968 | 2004 | 19,107,856 | 2003 | 18,643,377 | 2002 | 18,167,507 | 2001 | 17,685,749 | 2000 | 17,205,160 | 1999 | 16,727,051 | 1998 | 16,251,748 | 1997 | 15,780,627 | 1996 | 15,316,652 | 1995 | 14,859,864 | 1994 | 14,405,469 | 1993 | 13,953,434 | 1992 | 13,453,704 | 1991 | 12,860,932 | 1990 | 12,256,928 | 1989 | 11,657,705 | 1988 | 11,074,572 | 1987 | 10,509,439 | 1986 | 9,964,195 | 1985 | 9,364,376 | 1984 | 8,784,674 | 1983 | 8,226,090 | 1982 | 7,692,168 | 1981 | 7,184,407 | 1980 | 6,699,088 | 1979 | 6,235,693 | 1978 | 5,795,747 | 1977 | 5,377,543 | 1976 | 4,983,164 | 1975 | 4,608,138 | 1974 | 4,243,447 | 1973 | 3,878,401 | 1972 | 3,544,156 | 1971 | 3,242,338 | 1970 | 2,971,822 | 1969 | 2,726,912 | 1968 | 2,502,670 | 1967 | 2,295,815 | 1966 | 2,105,611 | 1965 | 1,930,278 | 1964 | 1,768,060 | 1963 | 1,618,088 | 1962 | 1,494,405 | 1961 | 1,393,997 | 1960 | 1,301,738 |
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