Year | Value | 2022 | 29,921,299 | 2021 | 28,683,893 | 2020 | 27,999,513 | 2019 | 27,686,645 | 2018 | 27,604,955 | 2017 | 27,599,323 | 2016 | 27,330,596 | 2015 | 26,847,211 | 2014 | 26,298,284 | 2013 | 25,645,262 | 2012 | 24,902,343 | 2011 | 24,127,914 | 2010 | 23,457,396 | 2009 | 22,935,552 | 2008 | 22,490,404 | 2007 | 22,030,897 | 2006 | 21,536,081 | 2005 | 20,962,876 | 2004 | 20,335,788 | 2003 | 19,615,405 | 2002 | 18,777,286 | 2001 | 17,967,341 | 2000 | 17,145,942 | 1999 | 16,274,025 | 1998 | 15,453,170 | 1997 | 14,762,699 | 1996 | 14,196,727 | 1995 | 13,762,529 | 1994 | 13,500,038 | 1993 | 13,337,994 | 1992 | 13,209,563 | 1991 | 13,080,755 | 1990 | 12,888,345 | 1989 | 12,575,174 | 1988 | 12,195,030 | 1987 | 11,843,566 | 1986 | 11,538,654 | 1985 | 11,261,126 | 1984 | 10,946,755 | 1983 | 10,634,032 | 1982 | 10,347,074 | 1981 | 10,047,880 | 1980 | 9,700,522 | 1979 | 9,279,364 | 1978 | 8,775,833 | 1977 | 8,274,249 | 1976 | 7,818,525 | 1975 | 7,409,064 | 1974 | 7,087,031 | 1973 | 6,829,848 | 1972 | 6,582,968 | 1971 | 6,309,759 | 1970 | 6,043,231 | 1969 | 5,825,378 | 1968 | 5,659,001 | 1967 | 5,515,819 | 1966 | 5,396,705 | 1965 | 5,304,119 | 1964 | 5,203,446 | 1963 | 5,053,416 | 1962 | 4,914,915 | 1961 | 4,862,169 | 1960 | 4,890,464 |
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