Year | Value | 2022 | 20,979,233 | 2021 | 20,766,246 | 2020 | 20,886,852 | 2019 | 20,836,089 | 2018 | 20,335,495 | 2017 | 19,828,621 | 2016 | 19,291,301 | 2015 | 18,774,108 | 2014 | 18,364,145 | 2013 | 18,009,033 | 2012 | 17,644,476 | 2011 | 17,276,508 | 2010 | 16,865,108 | 2009 | 16,324,114 | 2008 | 15,700,185 | 2007 | 15,083,370 | 2006 | 14,481,085 | 2005 | 13,900,240 | 2004 | 13,489,705 | 2003 | 13,221,628 | 2002 | 12,928,084 | 2001 | 12,623,833 | 2000 | 12,317,247 | 1999 | 12,011,628 | 1998 | 11,706,297 | 1997 | 11,401,339 | 1996 | 11,100,958 | 1995 | 10,806,201 | 1994 | 10,504,597 | 1993 | 10,199,979 | 1992 | 9,870,913 | 1991 | 9,500,950 | 1990 | 9,114,257 | 1989 | 8,724,566 | 1988 | 8,341,808 | 1987 | 7,967,798 | 1986 | 7,603,359 | 1985 | 7,244,513 | 1984 | 6,890,859 | 1983 | 6,544,204 | 1982 | 6,208,137 | 1981 | 5,885,125 | 1980 | 5,570,413 | 1979 | 5,264,577 | 1978 | 4,969,329 | 1977 | 4,682,826 | 1976 | 4,409,023 | 1975 | 4,143,899 | 1974 | 3,898,052 | 1973 | 3,678,640 | 1972 | 3,476,608 | 1971 | 3,296,426 | 1970 | 3,138,500 | 1969 | 2,997,831 | 1968 | 2,869,387 | 1967 | 2,750,465 | 1966 | 2,640,472 | 1965 | 2,537,904 | 1964 | 2,441,065 | 1963 | 2,349,938 | 1962 | 2,264,514 | 1961 | 2,185,102 | 1960 | 2,112,675 |
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