| Year | Value | | 2022 | 2,507 | | 2021 | 2,459 | | 2020 | 2,444 | | 2019 | 2,470 | | 2018 | 2,530 | | 2017 | 2,611 | | 2016 | 2,699 | | 2015 | 2,773 | | 2014 | 2,815 | | 2013 | 2,811 | | 2012 | 2,763 | | 2011 | 2,680 | | 2010 | 2,572 | | 2009 | 2,452 | | 2008 | 2,334 | | 2007 | 2,218 | | 2006 | 2,097 | | 2005 | 1,991 | | 2004 | 1,908 | | 2003 | 1,829 | | 2002 | 1,763 | | 2001 | 1,724 | | 2000 | 1,697 | | 1999 | 1,661 | | 1998 | 1,622 | | 1997 | 1,577 | | 1996 | 1,527 | | 1995 | 1,479 | | 1994 | 1,439 | | 1993 | 1,412 | | 1992 | 1,400 | | 1991 | 1,397 | | 1990 | 1,380 | | 1989 | 1,349 | | 1988 | 1,312 | | 1987 | 1,258 | | 1986 | 1,193 | | 1985 | 1,140 | | 1984 | 1,102 | | 1983 | 1,088 | | 1982 | 1,103 | | 1981 | 1,136 | | 1980 | 1,173 | | 1979 | 1,217 | | 1978 | 1,241 | | 1977 | 1,232 | | 1976 | 1,206 | | 1975 | 1,184 | | 1974 | 1,180 | | 1973 | 1,167 | | 1972 | 1,133 | | 1971 | 1,097 | | 1970 | 1,065 | | 1969 | 1,036 | | 1968 | 1,018 | | 1967 | 1,006 | | 1966 | 990 | | 1965 | 970 | | 1964 | 949 | | 1963 | 930 | | 1962 | 913 | | 1961 | 897 | | 1960 | 882 |
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