| Year | Value | | 2022 | 10,780 | | 2021 | 11,110 | | 2020 | 11,460 | | 2019 | 11,747 | | 2018 | 11,958 | | 2017 | 12,080 | | 2016 | 12,104 | | 2015 | 12,158 | | 2014 | 12,248 | | 2013 | 12,261 | | 2012 | 12,259 | | 2011 | 12,275 | | 2010 | 12,099 | | 2009 | 11,704 | | 2008 | 11,207 | | 2007 | 10,591 | | 2006 | 10,039 | | 2005 | 9,761 | | 2004 | 9,701 | | 2003 | 9,781 | | 2002 | 9,879 | | 2001 | 9,943 | | 2000 | 10,004 | | 1999 | 10,055 | | 1998 | 10,076 | | 1997 | 10,056 | | 1996 | 10,033 | | 1995 | 10,000 | | 1994 | 9,922 | | 1993 | 9,816 | | 1992 | 9,687 | | 1991 | 9,525 | | 1990 | 9,321 | | 1989 | 9,075 | | 1988 | 8,719 | | 1987 | 8,277 | | 1986 | 7,840 | | 1985 | 7,411 | | 1984 | 6,988 | | 1983 | 6,695 | | 1982 | 6,447 | | 1981 | 6,113 | | 1980 | 5,771 | | 1979 | 5,439 | | 1978 | 5,145 | | 1977 | 4,890 | | 1976 | 4,677 | | 1975 | 4,522 | | 1974 | 4,410 | | 1973 | 4,308 | | 1972 | 4,218 | | 1971 | 4,148 | | 1970 | 4,077 | | 1969 | 3,998 | | 1968 | 3,908 | | 1967 | 3,809 | | 1966 | 3,701 | | 1965 | 3,581 | | 1964 | 3,451 | | 1963 | 3,322 | | 1962 | 3,207 | | 1961 | 3,103 | | 1960 | 2,999 |
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