| Year | Value | | 2022 | 14,921 | | 2021 | 14,226 | | 2020 | 13,431 | | 2019 | 12,621 | | 2018 | 11,806 | | 2017 | 11,036 | | 2016 | 10,350 | | 2015 | 9,734 | | 2014 | 9,151 | | 2013 | 8,624 | | 2012 | 8,138 | | 2011 | 7,617 | | 2010 | 7,042 | | 2009 | 6,422 | | 2008 | 5,791 | | 2007 | 5,197 | | 2006 | 4,692 | | 2005 | 4,288 | | 2004 | 3,981 | | 2003 | 3,751 | | 2002 | 3,563 | | 2001 | 3,404 | | 2000 | 3,290 | | 1999 | 3,247 | | 1998 | 3,260 | | 1997 | 3,297 | | 1996 | 3,337 | | 1995 | 3,365 | | 1994 | 3,418 | | 1993 | 3,498 | | 1992 | 3,566 | | 1991 | 3,602 | | 1990 | 3,602 | | 1989 | 3,605 | | 1988 | 3,625 | | 1987 | 3,627 | | 1986 | 3,587 | | 1985 | 3,503 | | 1984 | 3,407 | | 1983 | 3,327 | | 1982 | 3,250 | | 1981 | 3,171 | | 1980 | 3,090 | | 1979 | 2,998 | | 1978 | 2,902 | | 1977 | 2,810 | | 1976 | 2,717 | | 1975 | 2,620 | | 1974 | 2,523 | | 1973 | 2,432 | | 1972 | 2,348 | | 1971 | 2,266 | | 1970 | 2,190 | | 1969 | 2,117 | | 1968 | 2,046 | | 1967 | 1,995 | | 1966 | 1,982 | | 1965 | 1,995 | | 1964 | 1,987 | | 1963 | 1,949 | | 1962 | 1,909 | | 1961 | 1,865 | | 1960 | 1,812 |
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