| Year | Value | | 2022 | 14,608 | | 2021 | 14,203 | | 2020 | 14,237 | | 2019 | 13,943 | | 2018 | 13,336 | | 2017 | 12,718 | | 2016 | 12,201 | | 2015 | 11,752 | | 2014 | 11,275 | | 2013 | 10,845 | | 2012 | 10,484 | | 2011 | 10,135 | | 2010 | 9,759 | | 2009 | 9,358 | | 2008 | 8,985 | | 2007 | 8,652 | | 2006 | 8,309 | | 2005 | 7,921 | | 2004 | 7,522 | | 2003 | 7,121 | | 2002 | 6,740 | | 2001 | 6,368 | | 2000 | 5,972 | | 1999 | 5,630 | | 1998 | 5,358 | | 1997 | 5,150 | | 1996 | 4,994 | | 1995 | 4,857 | | 1994 | 4,722 | | 1993 | 4,542 | | 1992 | 4,352 | | 1991 | 4,181 | | 1990 | 3,893 | | 1989 | 3,647 | | 1988 | 3,417 | | 1987 | 3,191 | | 1986 | 2,975 | | 1985 | 2,734 | | 1984 | 2,515 | | 1983 | 2,396 | | 1982 | 2,308 | | 1981 | 2,219 | | 1980 | 2,139 | | 1979 | 2,076 | | 1978 | 2,042 | | 1977 | 2,027 | | 1976 | 2,042 | | 1975 | 2,036 | | 1974 | 1,989 | | 1973 | 1,944 | | 1972 | 1,872 | | 1971 | 1,790 | | 1970 | 1,713 | | 1969 | 1,643 | | 1968 | 1,583 | | 1967 | 1,533 | | 1966 | 1,505 | | 1965 | 1,472 | | 1964 | 1,429 | | 1963 | 1,396 | | 1962 | 1,364 | | 1961 | 1,347 | | 1960 | 1,340 |
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