| Year | Value | | 2022 | 15,211 | | 2021 | 14,619 | | 2020 | 14,051 | | 2019 | 13,482 | | 2018 | 12,923 | | 2017 | 12,402 | | 2016 | 11,946 | | 2015 | 11,598 | | 2014 | 11,384 | | 2013 | 11,252 | | 2012 | 11,125 | | 2011 | 10,958 | | 2010 | 10,709 | | 2009 | 10,345 | | 2008 | 9,925 | | 2007 | 9,529 | | 2006 | 9,159 | | 2005 | 8,825 | | 2004 | 8,538 | | 2003 | 8,282 | | 2002 | 8,020 | | 2001 | 7,740 | | 2000 | 7,472 | | 1999 | 7,213 | | 1998 | 6,947 | | 1997 | 6,676 | | 1996 | 6,436 | | 1995 | 6,250 | | 1994 | 6,150 | | 1993 | 5,996 | | 1992 | 6,076 | | 1991 | 6,092 | | 1990 | 5,567 | | 1989 | 5,003 | | 1988 | 4,611 | | 1987 | 4,305 | | 1986 | 4,023 | | 1985 | 3,786 | | 1984 | 3,596 | | 1983 | 3,446 | | 1982 | 3,314 | | 1981 | 3,174 | | 1980 | 3,003 | | 1979 | 2,793 | | 1978 | 2,556 | | 1977 | 2,311 | | 1976 | 2,084 | | 1975 | 1,892 | | 1974 | 1,734 | | 1973 | 1,605 | | 1972 | 1,495 | | 1971 | 1,394 | | 1970 | 1,300 | | 1969 | 1,215 | | 1968 | 1,139 | | 1967 | 1,073 | | 1966 | 1,012 | | 1965 | 952 | | 1964 | 897 | | 1963 | 849 | | 1962 | 807 | | 1961 | 770 | | 1960 | 738 |
|