Year | Value | 2022 | 30,725,879 | 2021 | 30,497,646 | 2020 | 30,221,143 | 2019 | 29,879,107 | 2018 | 29,517,286 | 2017 | 29,175,940 | 2016 | 29,004,108 | 2015 | 28,721,087 | 2014 | 28,228,865 | 2013 | 27,837,495 | 2012 | 27,493,643 | 2011 | 27,164,417 | 2010 | 26,857,414 | 2009 | 26,570,865 | 2008 | 26,287,724 | 2007 | 26,023,987 | 2006 | 25,795,511 | 2005 | 25,583,854 | 2004 | 25,379,489 | 2003 | 25,178,665 | 2002 | 24,979,734 | 2001 | 24,781,908 | 2000 | 24,591,889 | 1999 | 24,387,653 | 1998 | 24,148,681 | 1997 | 23,879,335 | 1996 | 23,507,455 | 1995 | 23,025,116 | 1994 | 22,522,796 | 1993 | 22,006,067 | 1992 | 21,471,959 | 1991 | 20,972,094 | 1990 | 20,454,959 | 1989 | 19,858,547 | 1988 | 19,231,343 | 1987 | 18,604,223 | 1986 | 17,993,069 | 1985 | 17,243,333 | 1984 | 16,431,317 | 1983 | 15,739,461 | 1982 | 15,130,329 | 1981 | 14,600,980 | 1980 | 14,186,385 | 1979 | 13,862,168 | 1978 | 13,549,026 | 1977 | 13,245,666 | 1976 | 12,931,705 | 1975 | 12,610,329 | 1974 | 12,297,952 | 1973 | 11,991,274 | 1972 | 11,690,167 | 1971 | 11,392,269 | 1970 | 11,070,685 | 1969 | 10,725,797 | 1968 | 10,385,268 | 1967 | 10,051,232 | 1966 | 9,726,980 | 1965 | 9,412,255 | 1964 | 9,107,018 | 1963 | 8,813,888 | 1962 | 8,532,023 | 1961 | 8,263,745 | 1960 | 8,017,980 |
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