| Year | Value | | 2022 | 3,345 | | 2021 | 3,410 | | 2020 | 3,480 | | 2019 | 3,559 | | 2018 | 3,640 | | 2017 | 3,713 | | 2016 | 3,789 | | 2015 | 3,878 | | 2014 | 3,982 | | 2013 | 4,095 | | 2012 | 4,207 | | 2011 | 4,297 | | 2010 | 4,341 | | 2009 | 4,321 | | 2008 | 4,253 | | 2007 | 4,161 | | 2006 | 4,030 | | 2005 | 3,867 | | 2004 | 3,713 | | 2003 | 3,569 | | 2002 | 3,442 | | 2001 | 3,335 | | 2000 | 3,233 | | 1999 | 3,115 | | 1998 | 2,970 | | 1997 | 2,813 | | 1996 | 2,660 | | 1995 | 2,507 | | 1994 | 2,360 | | 1993 | 2,226 | | 1992 | 2,104 | | 1991 | 2,013 | | 1990 | 1,946 | | 1989 | 1,881 | | 1988 | 1,832 | | 1987 | 1,805 | | 1986 | 1,787 | | 1985 | 1,758 | | 1984 | 1,715 | | 1983 | 1,673 | | 1982 | 1,635 | | 1981 | 1,590 | | 1980 | 1,535 | | 1979 | 1,474 | | 1978 | 1,409 | | 1977 | 1,338 | | 1976 | 1,281 | | 1975 | 1,242 | | 1974 | 1,205 | | 1973 | 1,165 | | 1972 | 1,131 | | 1971 | 1,101 | | 1970 | 1,080 | | 1969 | 1,073 | | 1968 | 1,077 | | 1967 | 1,098 | | 1966 | 1,127 | | 1965 | 1,158 | | 1964 | 1,200 | | 1963 | 1,244 | | 1962 | 1,278 | | 1961 | 1,309 | | 1960 | 1,330 |
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