| Year | Value | | 2022 | 38,083 | | 2021 | 36,780 | | 2020 | 35,543 | | 2019 | 34,285 | | 2018 | 32,995 | | 2017 | 31,707 | | 2016 | 30,424 | | 2015 | 29,146 | | 2014 | 27,887 | | 2013 | 26,654 | | 2012 | 25,452 | | 2011 | 24,301 | | 2010 | 23,217 | | 2009 | 22,198 | | 2008 | 21,236 | | 2007 | 20,334 | | 2006 | 19,495 | | 2005 | 18,714 | | 2004 | 17,985 | | 2003 | 17,303 | | 2002 | 16,662 | | 2001 | 16,058 | | 2000 | 15,481 | | 1999 | 14,922 | | 1998 | 14,374 | | 1997 | 13,830 | | 1996 | 13,289 | | 1995 | 12,759 | | 1994 | 12,250 | | 1993 | 11,779 | | 1992 | 11,363 | | 1991 | 11,009 | | 1990 | 10,713 | | 1989 | 10,465 | | 1988 | 10,237 | | 1987 | 10,005 | | 1986 | 9,751 | | 1985 | 9,463 | | 1984 | 9,134 | | 1983 | 8,769 | | 1982 | 8,377 | | 1981 | 7,971 | | 1980 | 7,574 | | 1979 | 7,208 | | 1978 | 6,891 | | 1977 | 6,627 | | 1976 | 6,415 | | 1975 | 6,246 | | 1974 | 6,096 | | 1973 | 5,942 | | 1972 | 5,771 | | 1971 | 5,575 | | 1970 | 5,355 | | 1969 | 5,124 | | 1968 | 4,896 | | 1967 | 4,685 | | 1966 | 4,501 | | 1965 | 4,347 | | 1964 | 4,220 | | 1963 | 4,112 | | 1962 | 4,014 | | 1961 | 3,918 | | 1960 | 3,821 |
|