Year | Value | 2022 | 21,131,398 | 2021 | 21,370,594 | 2020 | 21,648,529 | 2019 | 21,947,758 | 2018 | 22,158,910 | 2017 | 22,232,216 | 2016 | 22,179,163 | 2015 | 21,938,672 | 2014 | 21,484,082 | 2013 | 20,904,980 | 2012 | 20,303,282 | 2011 | 19,729,823 | 2010 | 19,181,166 | 2009 | 18,669,318 | 2008 | 18,192,280 | 2007 | 17,769,756 | 2006 | 17,438,480 | 2005 | 17,146,283 | 2004 | 16,874,341 | 2003 | 16,656,427 | 2002 | 16,507,245 | 2001 | 16,409,294 | 2000 | 16,375,300 | 1999 | 16,439,663 | 1998 | 16,607,355 | 1997 | 16,872,483 | 1996 | 17,186,821 | 1995 | 17,454,779 | 1994 | 17,635,729 | 1993 | 17,748,619 | 1992 | 17,806,984 | 1991 | 17,838,829 | 1990 | 17,859,176 | 1989 | 17,648,640 | 1988 | 17,544,370 | 1987 | 17,351,480 | 1986 | 17,045,083 | 1985 | 16,652,746 | 1984 | 16,210,406 | 1983 | 15,710,503 | 1982 | 15,181,297 | 1981 | 14,655,127 | 1980 | 14,146,164 | 1979 | 13,661,511 | 1978 | 13,239,248 | 1977 | 12,865,713 | 1976 | 12,463,839 | 1975 | 12,066,890 | 1974 | 11,751,636 | 1973 | 11,499,019 | 1972 | 11,258,632 | 1971 | 11,014,527 | 1970 | 10,765,930 | 1969 | 10,520,878 | 1968 | 10,286,086 | 1967 | 10,058,416 | 1966 | 9,821,421 | 1965 | 9,573,045 | 1964 | 9,321,488 | 1963 | 9,064,162 | 1962 | 8,807,194 | 1961 | 8,581,529 | 1960 | 8,386,852 |
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