Year | Value | 2022 | 39,046 | 2021 | 38,160 | 2020 | 37,074 | 2019 | 35,575 | 2018 | 33,907 | 2017 | 32,629 | 2016 | 31,994 | 2015 | 31,788 | 2014 | 31,593 | 2013 | 31,179 | 2012 | 30,724 | 2011 | 30,491 | 2010 | 30,441 | 2009 | 30,491 | 2008 | 30,633 | 2007 | 30,684 | 2006 | 30,353 | 2005 | 29,642 | 2004 | 28,739 | 2003 | 27,831 | 2002 | 27,085 | 2001 | 26,830 | 2000 | 26,362 | 1999 | 25,837 | 1998 | 25,200 | 1997 | 24,425 | 1996 | 23,650 | 1995 | 22,721 | 1994 | 21,780 | 1993 | 20,770 | 1992 | 19,669 | 1991 | 18,543 | 1990 | 17,541 | 1989 | 16,851 | 1988 | 16,646 | 1987 | 17,063 | 1986 | 18,019 | 1985 | 19,260 | 1984 | 20,456 | 1983 | 21,241 | 1982 | 21,304 | 1981 | 20,580 | 1980 | 19,273 | 1979 | 17,571 | 1978 | 15,691 | 1977 | 13,920 | 1976 | 12,423 | 1975 | 11,224 | 1974 | 10,354 | 1973 | 9,824 | 1972 | 9,574 | 1971 | 9,612 | 1970 | 9,806 | 1969 | 9,944 | 1968 | 9,980 | 1967 | 9,901 | 1966 | 9,628 | 1965 | 9,312 | 1964 | 9,208 | 1963 | 9,375 | 1962 | 9,852 | 1961 | 10,536 | 1960 | 11,174 |
|