| Year | Value | | 2022 | 7,259 | | 2021 | 7,276 | | 2020 | 7,307 | | 2019 | 7,222 | | 2018 | 6,950 | | 2017 | 6,509 | | 2016 | 6,002 | | 2015 | 5,523 | | 2014 | 5,131 | | 2013 | 4,927 | | 2012 | 4,941 | | 2011 | 5,118 | | 2010 | 5,352 | | 2009 | 5,530 | | 2008 | 5,530 | | 2007 | 5,296 | | 2006 | 4,872 | | 2005 | 4,361 | | 2004 | 3,880 | | 2003 | 3,625 | | 2002 | 3,684 | | 2001 | 3,834 | | 2000 | 3,843 | | 1999 | 3,654 | | 1998 | 3,478 | | 1997 | 3,410 | | 1996 | 3,352 | | 1995 | 3,308 | | 1994 | 3,274 | | 1993 | 3,252 | | 1992 | 3,247 | | 1991 | 3,221 | | 1990 | 3,182 | | 1989 | 3,172 | | 1988 | 3,173 | | 1987 | 3,174 | | 1986 | 3,168 | | 1985 | 3,154 | | 1984 | 3,129 | | 1983 | 3,091 | | 1982 | 3,038 | | 1981 | 2,990 | | 1980 | 2,953 | | 1979 | 2,896 | | 1978 | 2,813 | | 1977 | 2,722 | | 1976 | 2,625 | | 1975 | 2,524 | | 1974 | 2,423 | | 1973 | 2,322 | | 1972 | 2,224 | | 1971 | 2,129 | | 1970 | 2,045 | | 1969 | 1,970 | | 1968 | 1,903 | | 1967 | 1,848 | | 1966 | 1,801 | | 1965 | 1,758 | | 1964 | 1,717 | | 1963 | 1,678 | | 1962 | 1,641 | | 1961 | 1,606 | | 1960 | 1,572 |
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