| Year | Value | | 2022 | 13,343 | | 2021 | 13,184 | | 2020 | 13,001 | | 2019 | 12,733 | | 2018 | 12,325 | | 2017 | 11,787 | | 2016 | 11,193 | | 2015 | 10,601 | | 2014 | 9,984 | | 2013 | 9,388 | | 2012 | 8,807 | | 2011 | 8,230 | | 2010 | 7,701 | | 2009 | 7,243 | | 2008 | 6,897 | | 2007 | 6,660 | | 2006 | 6,467 | | 2005 | 6,208 | | 2004 | 5,968 | | 2003 | 5,800 | | 2002 | 5,674 | | 2001 | 5,615 | | 2000 | 5,598 | | 1999 | 5,527 | | 1998 | 5,349 | | 1997 | 5,128 | | 1996 | 4,915 | | 1995 | 4,741 | | 1994 | 4,556 | | 1993 | 4,352 | | 1992 | 4,187 | | 1991 | 4,012 | | 1990 | 3,823 | | 1989 | 3,725 | | 1988 | 3,690 | | 1987 | 3,615 | | 1986 | 3,527 | | 1985 | 3,442 | | 1984 | 3,335 | | 1983 | 3,247 | | 1982 | 3,200 | | 1981 | 3,176 | | 1980 | 3,155 | | 1979 | 3,130 | | 1978 | 3,104 | | 1977 | 3,072 | | 1976 | 3,024 | | 1975 | 2,957 | | 1974 | 2,867 | | 1973 | 2,764 | | 1972 | 2,658 | | 1971 | 2,557 | | 1970 | 2,469 | | 1969 | 2,403 | | 1968 | 2,349 | | 1967 | 2,269 | | 1966 | 2,156 | | 1965 | 2,020 | | 1964 | 1,879 | | 1963 | 1,776 | | 1962 | 1,717 | | 1961 | 1,673 | | 1960 | 1,637 |
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