| Year | Value | | 2022 | 11,392 | | 2021 | 10,971 | | 2020 | 10,559 | | 2019 | 10,160 | | 2018 | 9,747 | | 2017 | 9,329 | | 2016 | 8,946 | | 2015 | 8,539 | | 2014 | 8,111 | | 2013 | 7,685 | | 2012 | 7,286 | | 2011 | 6,949 | | 2010 | 6,691 | | 2009 | 6,501 | | 2008 | 6,364 | | 2007 | 6,267 | | 2006 | 6,208 | | 2005 | 6,177 | | 2004 | 6,158 | | 2003 | 6,132 | | 2002 | 6,084 | | 2001 | 5,992 | | 2000 | 5,849 | | 1999 | 5,684 | | 1998 | 5,536 | | 1997 | 5,450 | | 1996 | 5,477 | | 1995 | 5,634 | | 1994 | 5,896 | | 1993 | 6,195 | | 1992 | 6,452 | | 1991 | 6,602 | | 1990 | 6,573 | | 1989 | 6,368 | | 1988 | 6,084 | | 1987 | 5,803 | | 1986 | 5,588 | | 1985 | 5,477 | | 1984 | 5,475 | | 1983 | 5,546 | | 1982 | 5,648 | | 1981 | 5,739 | | 1980 | 5,785 | | 1979 | 5,762 | | 1978 | 5,681 | | 1977 | 5,571 | | 1976 | 5,461 | | 1975 | 5,387 | | 1974 | 5,364 | | 1973 | 5,386 | | 1972 | 5,429 | | 1971 | 5,464 | | 1970 | 5,441 | | 1969 | 5,350 | | 1968 | 5,221 | | 1967 | 5,067 | | 1966 | 4,909 | | 1965 | 4,762 | | 1964 | 4,641 | | 1963 | 4,553 | | 1962 | 4,486 | | 1961 | 4,432 | | 1960 | 4,344 |
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