| Year | Value | | 2022 | 29,077 | | 2021 | 28,589 | | 2020 | 28,253 | | 2019 | 28,255 | | 2018 | 28,011 | | 2017 | 27,623 | | 2016 | 27,385 | | 2015 | 27,057 | | 2014 | 25,979 | | 2013 | 24,080 | | 2012 | 22,612 | | 2011 | 21,793 | | 2010 | 20,798 | | 2009 | 19,054 | | 2008 | 16,853 | | 2007 | 14,760 | | 2006 | 12,824 | | 2005 | 11,084 | | 2004 | 9,559 | | 2003 | 8,396 | | 2002 | 7,682 | | 2001 | 7,230 | | 2000 | 6,875 | | 1999 | 6,586 | | 1998 | 6,350 | | 1997 | 6,168 | | 1996 | 6,030 | | 1995 | 5,926 | | 1994 | 5,839 | | 1993 | 5,752 | | 1992 | 5,658 | | 1991 | 5,545 | | 1990 | 5,407 | | 1989 | 5,253 | | 1988 | 5,101 | | 1987 | 4,970 | | 1986 | 4,850 | | 1985 | 4,730 | | 1984 | 4,600 | | 1983 | 4,440 | | 1982 | 4,255 | | 1981 | 4,068 | | 1980 | 3,882 | | 1979 | 3,704 | | 1978 | 3,543 | | 1977 | 3,397 | | 1976 | 3,264 | | 1975 | 3,147 | | 1974 | 3,042 | | 1973 | 2,948 | | 1972 | 2,857 | | 1971 | 2,750 | | 1970 | 2,605 | | 1969 | 2,434 | | 1968 | 2,277 | | 1967 | 2,141 | | 1966 | 2,029 | | 1965 | 1,932 | | 1964 | 1,863 | | 1963 | 1,817 | | 1962 | 1,771 | | 1961 | 1,729 | | 1960 | 1,691 |
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