| Year | Value | | 2022 | 2,609 | | 2021 | 2,602 | | 2020 | 2,618 | | 2019 | 2,664 | | 2018 | 2,699 | | 2017 | 2,695 | | 2016 | 2,680 | | 2015 | 2,648 | | 2014 | 2,547 | | 2013 | 2,426 | | 2012 | 2,329 | | 2011 | 2,253 | | 2010 | 2,207 | | 2009 | 2,194 | | 2008 | 2,177 | | 2007 | 2,152 | | 2006 | 2,116 | | 2005 | 2,072 | | 2004 | 2,034 | | 2003 | 2,007 | | 2002 | 1,990 | | 2001 | 1,979 | | 2000 | 1,964 | | 1999 | 1,943 | | 1998 | 1,933 | | 1997 | 1,936 | | 1996 | 1,948 | | 1995 | 1,962 | | 1994 | 1,966 | | 1993 | 1,943 | | 1992 | 1,903 | | 1991 | 1,870 | | 1990 | 1,855 | | 1989 | 1,860 | | 1988 | 1,885 | | 1987 | 1,912 | | 1986 | 1,922 | | 1985 | 1,915 | | 1984 | 1,899 | | 1983 | 1,878 | | 1982 | 1,859 | | 1981 | 1,848 | | 1980 | 1,842 | | 1979 | 1,830 | | 1978 | 1,809 | | 1977 | 1,786 | | 1976 | 1,751 | | 1975 | 1,702 | | 1974 | 1,649 | | 1973 | 1,598 | | 1972 | 1,550 | | 1971 | 1,499 | | 1970 | 1,449 | | 1969 | 1,399 | | 1968 | 1,352 | | 1967 | 1,308 | | 1966 | 1,265 | | 1965 | 1,220 | | 1964 | 1,175 | | 1963 | 1,131 | | 1962 | 1,088 | | 1961 | 1,045 | | 1960 | 1,005 |
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