| Year | Value | | 2022 | 9,403 | | 2021 | 8,886 | | 2020 | 8,598 | | 2019 | 8,450 | | 2018 | 8,215 | | 2017 | 7,959 | | 2016 | 7,765 | | 2015 | 7,513 | | 2014 | 7,179 | | 2013 | 6,844 | | 2012 | 6,502 | | 2011 | 6,112 | | 2010 | 5,656 | | 2009 | 5,258 | | 2008 | 4,977 | | 2007 | 4,743 | | 2006 | 4,587 | | 2005 | 4,539 | | 2004 | 4,515 | | 2003 | 4,480 | | 2002 | 4,473 | | 2001 | 4,543 | | 2000 | 4,672 | | 1999 | 4,756 | | 1998 | 4,790 | | 1997 | 4,799 | | 1996 | 4,736 | | 1995 | 4,621 | | 1994 | 4,502 | | 1993 | 4,390 | | 1992 | 4,281 | | 1991 | 4,232 | | 1990 | 4,217 | | 1989 | 4,137 | | 1988 | 4,035 | | 1987 | 3,944 | | 1986 | 3,807 | | 1985 | 3,645 | | 1984 | 3,555 | | 1983 | 3,517 | | 1982 | 3,474 | | 1981 | 3,427 | | 1980 | 3,379 | | 1979 | 3,350 | | 1978 | 3,311 | | 1977 | 3,223 | | 1976 | 3,169 | | 1975 | 3,139 | | 1974 | 3,106 | | 1973 | 3,110 | | 1972 | 3,110 | | 1971 | 3,047 | | 1970 | 2,965 | | 1969 | 2,879 | | 1968 | 2,771 | | 1967 | 2,717 | | 1966 | 2,742 | | 1965 | 2,763 | | 1964 | 2,754 | | 1963 | 2,749 | | 1962 | 2,731 | | 1961 | 2,698 | | 1960 | 2,623 |
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