| Year | Value | | 2022 | 10,059 | | 2021 | 10,192 | | 2020 | 10,421 | | 2019 | 10,640 | | 2018 | 10,736 | | 2017 | 10,791 | | 2016 | 10,908 | | 2015 | 11,075 | | 2014 | 11,218 | | 2013 | 11,172 | | 2012 | 11,090 | | 2011 | 11,020 | | 2010 | 10,948 | | 2009 | 10,876 | | 2008 | 10,795 | | 2007 | 10,683 | | 2006 | 10,513 | | 2005 | 10,406 | | 2004 | 10,266 | | 2003 | 9,982 | | 2002 | 9,680 | | 2001 | 9,402 | | 2000 | 9,214 | | 1999 | 9,098 | | 1998 | 9,038 | | 1997 | 9,057 | | 1996 | 9,153 | | 1995 | 9,305 | | 1994 | 9,455 | | 1993 | 9,554 | | 1992 | 9,604 | | 1991 | 9,578 | | 1990 | 9,459 | | 1989 | 9,328 | | 1988 | 9,195 | | 1987 | 8,990 | | 1986 | 8,747 | | 1985 | 8,495 | | 1984 | 8,230 | | 1983 | 7,967 | | 1982 | 7,719 | | 1981 | 7,490 | | 1980 | 7,302 | | 1979 | 7,179 | | 1978 | 7,100 | | 1977 | 7,000 | | 1976 | 6,854 | | 1975 | 6,719 | | 1974 | 6,594 | | 1973 | 6,442 | | 1972 | 6,306 | | 1971 | 6,084 | | 1970 | 5,768 | | 1969 | 5,348 | | 1968 | 5,041 | | 1967 | 4,886 | | 1966 | 4,751 | | 1965 | 4,600 | | 1964 | 4,456 | | 1963 | 4,306 | | 1962 | 4,159 | | 1961 | 4,013 | | 1960 | 3,879 |
|