| Year | Value | | 2022 | 10,722 | | 2021 | 10,370 | | 2020 | 9,953 | | 2019 | 9,525 | | 2018 | 9,110 | | 2017 | 8,717 | | 2016 | 8,354 | | 2015 | 8,032 | | 2014 | 7,716 | | 2013 | 7,417 | | 2012 | 7,124 | | 2011 | 6,754 | | 2010 | 6,288 | | 2009 | 5,752 | | 2008 | 5,178 | | 2007 | 4,624 | | 2006 | 4,151 | | 2005 | 3,781 | | 2004 | 3,506 | | 2003 | 3,318 | | 2002 | 3,192 | | 2001 | 3,098 | | 2000 | 3,032 | | 1999 | 3,015 | | 1998 | 3,033 | | 1997 | 3,061 | | 1996 | 3,087 | | 1995 | 3,092 | | 1994 | 3,100 | | 1993 | 3,125 | | 1992 | 3,135 | | 1991 | 3,111 | | 1990 | 3,047 | | 1989 | 2,973 | | 1988 | 2,909 | | 1987 | 2,845 | | 1986 | 2,767 | | 1985 | 2,663 | | 1984 | 2,550 | | 1983 | 2,458 | | 1982 | 2,378 | | 1981 | 2,297 | | 1980 | 2,215 | | 1979 | 2,133 | | 1978 | 2,050 | | 1977 | 1,968 | | 1976 | 1,891 | | 1975 | 1,812 | | 1974 | 1,735 | | 1973 | 1,668 | | 1972 | 1,604 | | 1971 | 1,539 | | 1970 | 1,477 | | 1969 | 1,417 | | 1968 | 1,358 | | 1967 | 1,311 | | 1966 | 1,283 | | 1965 | 1,266 | | 1964 | 1,233 | | 1963 | 1,182 | | 1962 | 1,129 | | 1961 | 1,075 | | 1960 | 1,020 |
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