Year | Value | 2022 | 30,963 | 2021 | 31,450 | 2020 | 31,682 | 2019 | 31,244 | 2018 | 30,535 | 2017 | 29,839 | 2016 | 29,111 | 2015 | 28,574 | 2014 | 28,356 | 2013 | 28,199 | 2012 | 27,929 | 2011 | 27,489 | 2010 | 26,895 | 2009 | 26,247 | 2008 | 25,629 | 2007 | 25,056 | 2006 | 24,515 | 2005 | 23,992 | 2004 | 23,477 | 2003 | 22,964 | 2002 | 22,439 | 2001 | 21,885 | 2000 | 21,289 | 1999 | 20,646 | 1998 | 19,960 | 1997 | 19,241 | 1996 | 18,469 | 1995 | 17,650 | 1994 | 16,595 | 1993 | 15,523 | 1992 | 14,834 | 1991 | 14,315 | 1990 | 13,826 | 1989 | 13,416 | 1988 | 13,105 | 1987 | 12,985 | 1986 | 12,848 | 1985 | 12,589 | 1984 | 12,364 | 1983 | 12,109 | 1982 | 11,826 | 1981 | 11,556 | 1980 | 11,317 | 1979 | 11,043 | 1978 | 10,714 | 1977 | 10,405 | 1976 | 10,105 | 1975 | 9,803 | 1974 | 9,515 | 1973 | 9,256 | 1972 | 9,027 | 1971 | 8,833 | 1970 | 8,674 | 1969 | 8,552 | 1968 | 8,467 | 1967 | 8,409 | 1966 | 8,366 | 1965 | 8,324 | 1964 | 8,272 | 1963 | 8,205 | 1962 | 8,131 | 1961 | 8,064 | 1960 | 8,006 |
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