| Year | Value | | 2022 | 11,608 | | 2021 | 11,345 | | 2020 | 11,049 | | 2019 | 10,727 | | 2018 | 10,388 | | 2017 | 10,031 | | 2016 | 9,675 | | 2015 | 9,347 | | 2014 | 9,057 | | 2013 | 8,845 | | 2012 | 8,723 | | 2011 | 8,624 | | 2010 | 8,519 | | 2009 | 8,374 | | 2008 | 8,140 | | 2007 | 7,834 | | 2006 | 7,513 | | 2005 | 7,201 | | 2004 | 6,898 | | 2003 | 6,608 | | 2002 | 6,340 | | 2001 | 6,094 | | 2000 | 5,865 | | 1999 | 5,660 | | 1998 | 5,483 | | 1997 | 5,325 | | 1996 | 5,184 | | 1995 | 5,061 | | 1994 | 4,957 | | 1993 | 4,865 | | 1992 | 4,780 | | 1991 | 4,700 | | 1990 | 4,625 | | 1989 | 4,562 | | 1988 | 4,505 | | 1987 | 4,443 | | 1986 | 4,375 | | 1985 | 4,295 | | 1984 | 4,200 | | 1983 | 4,108 | | 1982 | 4,001 | | 1981 | 3,865 | | 1980 | 3,720 | | 1979 | 3,548 | | 1978 | 3,368 | | 1977 | 3,239 | | 1976 | 3,156 | | 1975 | 3,089 | | 1974 | 3,035 | | 1973 | 2,984 | | 1972 | 2,932 | | 1971 | 2,875 | | 1970 | 2,812 | | 1969 | 2,744 | | 1968 | 2,672 | | 1967 | 2,599 | | 1966 | 2,528 | | 1965 | 2,460 | | 1964 | 2,395 | | 1963 | 2,335 | | 1962 | 2,278 | | 1961 | 2,225 | | 1960 | 2,175 |
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