| Year | Value | | 2022 | 15,443 | | 2021 | 15,225 | | 2020 | 14,996 | | 2019 | 14,728 | | 2018 | 14,477 | | 2017 | 14,230 | | 2016 | 13,965 | | 2015 | 13,680 | | 2014 | 13,389 | | 2013 | 13,141 | | 2012 | 12,932 | | 2011 | 12,626 | | 2010 | 12,349 | | 2009 | 12,029 | | 2008 | 11,530 | | 2007 | 11,041 | | 2006 | 10,585 | | 2005 | 10,153 | | 2004 | 9,747 | | 2003 | 9,368 | | 2002 | 9,011 | | 2001 | 8,686 | | 2000 | 8,398 | | 1999 | 8,128 | | 1998 | 7,866 | | 1997 | 7,614 | | 1996 | 7,372 | | 1995 | 7,143 | | 1994 | 6,927 | | 1993 | 6,720 | | 1992 | 6,525 | | 1991 | 6,329 | | 1990 | 5,905 | | 1989 | 5,451 | | 1988 | 5,030 | | 1987 | 4,637 | | 1986 | 4,270 | | 1985 | 3,925 | | 1984 | 3,601 | | 1983 | 3,299 | | 1982 | 3,018 | | 1981 | 2,758 | | 1980 | 2,526 | | 1979 | 2,392 | | 1978 | 2,289 | | 1977 | 2,190 | | 1976 | 2,094 | | 1975 | 2,002 | | 1974 | 1,915 | | 1973 | 1,833 | | 1972 | 1,756 | | 1971 | 1,685 | | 1970 | 1,594 | | 1969 | 1,471 | | 1968 | 1,354 | | 1967 | 1,266 | | 1966 | 1,199 | | 1965 | 1,146 | | 1964 | 1,101 | | 1963 | 1,064 | | 1962 | 1,029 | | 1961 | 995 | | 1960 | 960 |
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