| Year | Value | | 2022 | 9,436 | | 2021 | 9,661 | | 2020 | 9,829 | | 2019 | 9,890 | | 2018 | 9,841 | | 2017 | 9,718 | | 2016 | 9,541 | | 2015 | 9,320 | | 2014 | 9,080 | | 2013 | 8,795 | | 2012 | 8,530 | | 2011 | 8,256 | | 2010 | 7,963 | | 2009 | 7,684 | | 2008 | 7,406 | | 2007 | 7,080 | | 2006 | 6,725 | | 2005 | 6,422 | | 2004 | 6,161 | | 2003 | 5,905 | | 2002 | 5,682 | | 2001 | 5,481 | | 2000 | 5,308 | | 1999 | 5,167 | | 1998 | 5,047 | | 1997 | 4,935 | | 1996 | 4,811 | | 1995 | 4,668 | | 1994 | 4,507 | | 1993 | 4,338 | | 1992 | 4,188 | | 1991 | 4,067 | | 1990 | 3,965 | | 1989 | 3,889 | | 1988 | 3,823 | | 1987 | 3,725 | | 1986 | 3,598 | | 1985 | 3,461 | | 1984 | 3,320 | | 1983 | 3,182 | | 1982 | 3,060 | | 1981 | 2,947 | | 1980 | 2,849 | | 1979 | 2,776 | | 1978 | 2,719 | | 1977 | 2,658 | | 1976 | 2,586 | | 1975 | 2,534 | | 1974 | 2,500 | | 1973 | 2,454 | | 1972 | 2,400 | | 1971 | 2,295 | | 1970 | 2,141 | | 1969 | 2,013 | | 1968 | 1,964 | | 1967 | 1,922 | | 1966 | 1,877 | | 1965 | 1,832 | | 1964 | 1,803 | | 1963 | 1,772 | | 1962 | 1,741 | | 1961 | 1,716 | | 1960 | 1,690 |
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