Year | Value | 2022 | 26,727 | 2021 | 26,624 | 2020 | 26,728 | 2019 | 27,095 | 2018 | 27,628 | 2017 | 28,227 | 2016 | 28,817 | 2015 | 29,349 | 2014 | 29,855 | 2013 | 30,371 | 2012 | 30,874 | 2011 | 31,300 | 2010 | 31,550 | 2009 | 31,592 | 2008 | 31,464 | 2007 | 31,218 | 2006 | 30,918 | 2005 | 30,598 | 2004 | 30,252 | 2003 | 29,884 | 2002 | 29,507 | 2001 | 29,144 | 2000 | 28,782 | 1999 | 28,232 | 1998 | 27,428 | 1997 | 26,459 | 1996 | 25,340 | 1995 | 24,158 | 1994 | 22,995 | 1993 | 21,904 | 1992 | 20,953 | 1991 | 20,165 | 1990 | 19,541 | 1989 | 19,202 | 1988 | 19,125 | 1987 | 19,123 | 1986 | 19,138 | 1985 | 19,180 | 1984 | 19,244 | 1983 | 19,232 | 1982 | 19,069 | 1981 | 18,761 | 1980 | 18,370 | 1979 | 17,827 | 1978 | 17,322 | 1977 | 17,113 | 1976 | 17,127 | 1975 | 17,295 | 1974 | 17,210 | 1973 | 16,840 | 1972 | 16,538 | 1971 | 16,196 | 1970 | 15,549 | 1969 | 14,542 | 1968 | 13,410 | 1967 | 12,322 | 1966 | 11,307 | 1965 | 10,404 | 1964 | 9,669 | 1963 | 9,084 | 1962 | 8,589 | 1961 | 8,236 | 1960 | 8,182 |
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