| Year | Value | | 2022 | 11,769 | | 2021 | 10,486 | | 2020 | 9,603 | | 2019 | 8,695 | | 2018 | 7,837 | | 2017 | 7,535 | | 2016 | 7,746 | | 2015 | 8,018 | | 2014 | 8,111 | | 2013 | 8,076 | | 2012 | 8,011 | | 2011 | 7,959 | | 2010 | 7,885 | | 2009 | 7,751 | | 2008 | 7,549 | | 2007 | 7,276 | | 2006 | 6,998 | | 2005 | 6,769 | | 2004 | 6,564 | | 2003 | 6,446 | | 2002 | 6,379 | | 2001 | 6,254 | | 2000 | 6,098 | | 1999 | 5,938 | | 1998 | 5,699 | | 1997 | 5,413 | | 1996 | 5,118 | | 1995 | 4,783 | | 1994 | 4,487 | | 1993 | 4,288 | | 1992 | 4,202 | | 1991 | 4,202 | | 1990 | 4,147 | | 1989 | 4,155 | | 1988 | 4,165 | | 1987 | 4,174 | | 1986 | 4,179 | | 1985 | 4,123 | | 1984 | 4,040 | | 1983 | 4,012 | | 1982 | 3,924 | | 1981 | 3,764 | | 1980 | 3,585 | | 1979 | 3,369 | | 1978 | 3,163 | | 1977 | 2,978 | | 1976 | 2,854 | | 1975 | 2,778 | | 1974 | 2,737 | | 1973 | 2,757 | | 1972 | 2,786 | | 1971 | 2,807 | | 1970 | 2,798 | | 1969 | 2,765 | | 1968 | 2,710 | | 1967 | 2,626 | | 1966 | 2,543 | | 1965 | 2,456 | | 1964 | 2,367 | | 1963 | 2,293 | | 1962 | 2,236 | | 1961 | 2,192 | | 1960 | 2,151 |
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