Year | Value | 2022 | 46,234,533 | 2021 | 45,972,164 | 2020 | 45,748,112 | 2019 | 45,485,719 | 2018 | 45,423,001 | 2017 | 45,478,849 | 2016 | 45,724,561 | 2015 | 46,031,245 | 2014 | 46,209,887 | 2013 | 46,292,203 | 2012 | 46,293,230 | 2011 | 46,043,992 | 2010 | 45,869,348 | 2009 | 45,884,633 | 2008 | 45,892,178 | 2007 | 45,761,163 | 2006 | 45,694,736 | 2005 | 45,537,444 | 2004 | 45,104,695 | 2003 | 44,529,830 | 2002 | 43,959,428 | 2001 | 43,372,907 | 2000 | 42,732,592 | 1999 | 42,077,663 | 1998 | 41,431,008 | 1997 | 40,762,929 | 1996 | 40,256,759 | 1995 | 39,722,945 | 1994 | 39,110,151 | 1993 | 38,780,373 | 1992 | 38,652,021 | 1991 | 38,118,915 | 1990 | 36,900,035 | 1989 | 35,546,684 | 1988 | 34,215,194 | 1987 | 32,828,037 | 1986 | 31,598,403 | 1985 | 31,133,244 | 1984 | 31,005,323 | 1983 | 30,582,088 | 1982 | 30,126,418 | 1981 | 29,846,548 | 1980 | 29,521,844 | 1979 | 29,108,403 | 1978 | 28,832,366 | 1977 | 28,656,088 | 1976 | 28,494,960 | 1975 | 28,472,924 | 1974 | 28,645,253 | 1973 | 28,709,712 | 1972 | 28,594,725 | 1971 | 28,368,316 | 1970 | 27,874,563 | 1969 | 27,222,433 | 1968 | 26,735,805 | 1967 | 26,373,395 | 1966 | 25,875,869 | 1965 | 25,527,198 | 1964 | 25,122,610 | 1963 | 24,068,149 | 1962 | 22,722,135 | 1961 | 21,661,559 | 1960 | 20,806,500 |
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