| Year | Value | | 2022 | 2,218 | | 2021 | 2,092 | | 2020 | 1,996 | | 2019 | 1,920 | | 2018 | 1,854 | | 2017 | 1,795 | | 2016 | 1,741 | | 2015 | 1,679 | | 2014 | 1,612 | | 2013 | 1,548 | | 2012 | 1,500 | | 2011 | 1,475 | | 2010 | 1,475 | | 2009 | 1,504 | | 2008 | 1,555 | | 2007 | 1,614 | | 2006 | 1,667 | | 2005 | 1,707 | | 2004 | 1,732 | | 2003 | 1,743 | | 2002 | 1,737 | | 2001 | 1,732 | | 2000 | 1,709 | | 1999 | 1,655 | | 1998 | 1,603 | | 1997 | 1,555 | | 1996 | 1,508 | | 1995 | 1,457 | | 1994 | 1,415 | | 1993 | 1,377 | | 1992 | 1,340 | | 1991 | 1,307 | | 1990 | 1,284 | | 1989 | 1,266 | | 1988 | 1,251 | | 1987 | 1,242 | | 1986 | 1,241 | | 1985 | 1,241 | | 1984 | 1,242 | | 1983 | 1,249 | | 1982 | 1,255 | | 1981 | 1,261 | | 1980 | 1,274 | | 1979 | 1,288 | | 1978 | 1,308 | | 1977 | 1,336 | | 1976 | 1,364 | | 1975 | 1,385 | | 1974 | 1,398 | | 1973 | 1,393 | | 1972 | 1,368 | | 1971 | 1,336 | | 1970 | 1,302 | | 1969 | 1,265 | | 1968 | 1,234 | | 1967 | 1,212 | | 1966 | 1,191 | | 1965 | 1,169 | | 1964 | 1,151 | | 1963 | 1,135 | | 1962 | 1,123 | | 1961 | 1,116 | | 1960 | 1,108 |
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