| Year | Value | | 2022 | 8,926 | | 2021 | 8,705 | | 2020 | 9,263 | | 2019 | 10,007 | | 2018 | 10,190 | | 2017 | 10,158 | | 2016 | 10,070 | | 2015 | 9,668 | | 2014 | 9,165 | | 2013 | 8,693 | | 2012 | 7,959 | | 2011 | 6,967 | | 2010 | 6,025 | | 2009 | 5,635 | | 2008 | 5,707 | | 2007 | 5,735 | | 2006 | 5,640 | | 2005 | 5,413 | | 2004 | 5,103 | | 2003 | 4,984 | | 2002 | 5,088 | | 2001 | 5,179 | | 2000 | 5,227 | | 1999 | 5,225 | | 1998 | 5,159 | | 1997 | 5,022 | | 1996 | 4,832 | | 1995 | 4,615 | | 1994 | 4,393 | | 1993 | 4,185 | | 1992 | 4,009 | | 1991 | 3,861 | | 1990 | 3,720 | | 1989 | 3,583 | | 1988 | 3,446 | | 1987 | 3,304 | | 1986 | 3,166 | | 1985 | 3,032 | | 1984 | 2,905 | | 1983 | 2,786 | | 1982 | 2,672 | | 1981 | 2,564 | | 1980 | 2,463 | | 1979 | 2,370 | | 1978 | 2,281 | | 1977 | 2,198 | | 1976 | 2,121 | | 1975 | 2,048 | | 1974 | 1,980 | | 1973 | 1,917 | | 1972 | 1,859 | | 1971 | 1,803 | | 1970 | 1,751 | | 1969 | 1,706 | | 1968 | 1,669 | | 1967 | 1,637 | | 1966 | 1,608 | | 1965 | 1,581 | | 1964 | 1,552 | | 1963 | 1,524 | | 1962 | 1,495 | | 1961 | 1,465 | | 1960 | 1,436 |
|