Year | Value | 2022 | 46,283,227 | 2021 | 46,054,228 | 2020 | 45,822,445 | 2019 | 45,693,433 | 2018 | 45,633,185 | 2017 | 45,459,226 | 2016 | 45,390,709 | 2015 | 45,245,392 | 2014 | 44,798,968 | 2013 | 44,206,092 | 2012 | 43,647,224 | 2011 | 43,106,930 | 2010 | 42,577,006 | 2009 | 41,949,513 | 2008 | 41,306,843 | 2007 | 40,615,135 | 2006 | 40,074,184 | 2005 | 39,513,022 | 2004 | 38,866,081 | 2003 | 38,483,179 | 2002 | 38,355,934 | 2001 | 37,839,568 | 2000 | 36,641,196 | 1999 | 35,325,670 | 1998 | 33,995,504 | 1997 | 32,496,339 | 1996 | 31,195,107 | 1995 | 30,680,925 | 1994 | 30,440,502 | 1993 | 29,925,024 | 1992 | 29,403,416 | 1991 | 29,004,706 | 1990 | 28,601,343 | 1989 | 28,226,802 | 1988 | 27,898,641 | 1987 | 27,634,186 | 1986 | 27,443,282 | 1985 | 27,329,098 | 1984 | 27,338,535 | 1983 | 27,391,435 | 1982 | 27,412,269 | 1981 | 27,430,385 | 1980 | 27,384,045 | 1979 | 27,198,730 | 1978 | 27,162,840 | 1977 | 27,217,693 | 1976 | 27,073,891 | 1975 | 26,948,323 | 1974 | 26,612,593 | 1973 | 25,509,728 | 1972 | 24,051,068 | 1971 | 22,818,532 | 1970 | 21,754,617 | 1969 | 21,373,346 | 1968 | 21,866,781 | 1967 | 22,718,626 | 1966 | 23,471,415 | 1965 | 23,961,377 | 1964 | 24,081,242 | 1963 | 23,923,281 | 1962 | 23,641,974 | 1961 | 23,238,826 | 1960 | 22,804,472 |
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