| Year | Value | | 2022 | 12,772 | | 2021 | 12,316 | | 2020 | 11,846 | | 2019 | 11,294 | | 2018 | 10,725 | | 2017 | 10,194 | | 2016 | 9,709 | | 2015 | 9,249 | | 2014 | 8,830 | | 2013 | 8,467 | | 2012 | 8,155 | | 2011 | 7,656 | | 2010 | 7,105 | | 2009 | 6,731 | | 2008 | 6,345 | | 2007 | 5,921 | | 2006 | 5,487 | | 2005 | 5,054 | | 2004 | 4,706 | | 2003 | 4,529 | | 2002 | 4,375 | | 2001 | 4,144 | | 2000 | 3,918 | | 1999 | 3,683 | | 1998 | 3,407 | | 1997 | 3,015 | | 1996 | 2,735 | | 1995 | 2,610 | | 1994 | 2,537 | | 1993 | 2,488 | | 1992 | 2,326 | | 1991 | 2,126 | | 1990 | 2,325 | | 1989 | 2,547 | | 1988 | 2,389 | | 1987 | 2,243 | | 1986 | 2,107 | | 1985 | 1,976 | | 1984 | 1,846 | | 1983 | 1,861 | | 1982 | 1,913 | | 1981 | 1,879 | | 1980 | 1,886 | | 1979 | 1,928 | | 1978 | 1,994 | | 1977 | 2,079 | | 1976 | 2,179 | | 1975 | 2,296 | | 1974 | 2,318 | | 1973 | 2,232 | | 1972 | 2,147 | | 1971 | 2,068 | | 1970 | 1,997 | | 1969 | 1,931 | | 1968 | 1,871 | | 1967 | 1,815 | | 1966 | 1,756 | | 1965 | 1,693 | | 1964 | 1,621 | | 1963 | 1,538 | | 1962 | 1,479 | | 1961 | 1,453 | | 1960 | 1,428 |
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