| Year | Value | | 2022 | 12,423 | | 2021 | 11,715 | | 2020 | 11,085 | | 2019 | 10,469 | | 2018 | 9,844 | | 2017 | 9,236 | | 2016 | 8,716 | | 2015 | 8,224 | | 2014 | 7,779 | | 2013 | 7,398 | | 2012 | 7,069 | | 2011 | 6,794 | | 2010 | 6,574 | | 2009 | 6,371 | | 2008 | 6,187 | | 2007 | 6,029 | | 2006 | 5,876 | | 2005 | 5,747 | | 2004 | 5,639 | | 2003 | 5,547 | | 2002 | 5,456 | | 2001 | 5,357 | | 2000 | 5,275 | | 1999 | 5,220 | | 1998 | 5,190 | | 1997 | 5,163 | | 1996 | 5,139 | | 1995 | 5,101 | | 1994 | 5,055 | | 1993 | 4,996 | | 1992 | 4,918 | | 1991 | 4,829 | | 1990 | 4,716 | | 1989 | 4,598 | | 1988 | 4,473 | | 1987 | 4,351 | | 1986 | 4,250 | | 1985 | 4,171 | | 1984 | 4,118 | | 1983 | 4,071 | | 1982 | 4,026 | | 1981 | 3,957 | | 1980 | 3,856 | | 1979 | 3,738 | | 1978 | 3,589 | | 1977 | 3,434 | | 1976 | 3,297 | | 1975 | 3,149 | | 1974 | 2,985 | | 1973 | 2,844 | | 1972 | 2,726 | | 1971 | 2,616 | | 1970 | 2,529 | | 1969 | 2,471 | | 1968 | 2,420 | | 1967 | 2,359 | | 1966 | 2,285 | | 1965 | 2,211 | | 1964 | 2,143 | | 1963 | 2,088 | | 1962 | 2,048 | | 1961 | 2,015 | | 1960 | 1,996 |
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