Year | Value | 2022 | 16,467 | 2021 | 16,035 | 2020 | 15,983 | 2019 | 16,092 | 2018 | 16,100 | 2017 | 16,168 | 2016 | 16,118 | 2015 | 15,997 | 2014 | 15,862 | 2013 | 15,733 | 2012 | 15,529 | 2011 | 15,111 | 2010 | 14,671 | 2009 | 14,323 | 2008 | 14,046 | 2007 | 13,787 | 2006 | 13,500 | 2005 | 13,187 | 2004 | 12,819 | 2003 | 12,476 | 2002 | 12,231 | 2001 | 12,130 | 2000 | 11,866 | 1999 | 11,609 | 1998 | 11,463 | 1997 | 11,300 | 1996 | 11,149 | 1995 | 10,923 | 1994 | 10,684 | 1993 | 10,503 | 1992 | 10,454 | 1991 | 10,572 | 1990 | 10,804 | 1989 | 11,136 | 1988 | 11,551 | 1987 | 11,973 | 1986 | 12,407 | 1985 | 12,799 | 1984 | 13,140 | 1983 | 13,448 | 1982 | 13,669 | 1981 | 13,801 | 1980 | 13,855 | 1979 | 13,889 | 1978 | 13,928 | 1977 | 13,928 | 1976 | 13,841 | 1975 | 13,599 | 1974 | 13,244 | 1973 | 12,932 | 1972 | 12,730 | 1971 | 12,330 | 1970 | 11,876 | 1969 | 11,550 | 1968 | 11,266 | 1967 | 11,120 | 1966 | 10,971 | 1965 | 10,668 | 1964 | 10,318 | 1963 | 10,108 | 1962 | 10,000 | 1961 | 9,887 | 1960 | 9,906 |
|