Year | Value | 2022 | 28,468 | 2021 | 28,772 | 2020 | 28,679 | 2019 | 28,182 | 2018 | 27,359 | 2017 | 26,470 | 2016 | 25,696 | 2015 | 25,151 | 2014 | 24,798 | 2013 | 24,553 | 2012 | 24,220 | 2011 | 23,632 | 2010 | 22,823 | 2009 | 21,855 | 2008 | 20,812 | 2007 | 19,802 | 2006 | 18,830 | 2005 | 17,971 | 2004 | 17,196 | 2003 | 16,521 | 2002 | 16,033 | 2001 | 15,669 | 2000 | 15,383 | 1999 | 15,187 | 1998 | 15,149 | 1997 | 15,323 | 1996 | 15,614 | 1995 | 15,833 | 1994 | 15,903 | 1993 | 15,852 | 1992 | 15,722 | 1991 | 15,522 | 1990 | 15,358 | 1989 | 15,395 | 1988 | 15,268 | 1987 | 14,852 | 1986 | 14,350 | 1985 | 13,679 | 1984 | 12,867 | 1983 | 11,970 | 1982 | 11,008 | 1981 | 10,072 | 1980 | 9,264 | 1979 | 8,693 | 1978 | 8,336 | 1977 | 8,088 | 1976 | 7,931 | 1975 | 7,826 | 1974 | 7,784 | 1973 | 7,853 | 1972 | 7,992 | 1971 | 8,098 | 1970 | 8,095 | 1969 | 7,978 | 1968 | 7,734 | 1967 | 7,367 | 1966 | 6,971 | 1965 | 6,639 | 1964 | 6,360 | 1963 | 6,120 | 1962 | 5,936 | 1961 | 5,761 | 1960 | 5,575 |
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