| Year | Value | | 2022 | 3,080 | | 2021 | 3,090 | | 2020 | 3,099 | | 2019 | 3,107 | | 2018 | 3,088 | | 2017 | 3,026 | | 2016 | 2,963 | | 2015 | 2,940 | | 2014 | 2,966 | | 2013 | 3,030 | | 2012 | 3,115 | | 2011 | 3,159 | | 2010 | 3,155 | | 2009 | 3,161 | | 2008 | 3,183 | | 2007 | 3,185 | | 2006 | 3,199 | | 2005 | 3,214 | | 2004 | 3,193 | | 2003 | 3,163 | | 2002 | 3,153 | | 2001 | 3,143 | | 2000 | 3,142 | | 1999 | 3,161 | | 1998 | 3,169 | | 1997 | 3,162 | | 1996 | 3,151 | | 1995 | 3,130 | | 1994 | 3,027 | | 1993 | 2,818 | | 1992 | 2,577 | | 1991 | 2,432 | | 1990 | 2,385 | | 1989 | 2,307 | | 1988 | 2,199 | | 1987 | 2,075 | | 1986 | 1,940 | | 1985 | 1,813 | | 1984 | 1,727 | | 1983 | 1,684 | | 1982 | 1,647 | | 1981 | 1,612 | | 1980 | 1,576 | | 1979 | 1,540 | | 1978 | 1,509 | | 1977 | 1,485 | | 1976 | 1,469 | | 1975 | 1,455 | | 1974 | 1,442 | | 1973 | 1,430 | | 1972 | 1,418 | | 1971 | 1,405 | | 1970 | 1,384 | | 1969 | 1,356 | | 1968 | 1,328 | | 1967 | 1,298 | | 1966 | 1,267 | | 1965 | 1,235 | | 1964 | 1,204 | | 1963 | 1,175 | | 1962 | 1,145 | | 1961 | 1,115 | | 1960 | 1,085 |
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