Year | Value | 2022 | 31,005 | 2021 | 30,785 | 2020 | 30,630 | 2019 | 29,733 | 2018 | 28,585 | 2017 | 27,415 | 2016 | 26,356 | 2015 | 25,472 | 2014 | 24,757 | 2013 | 24,085 | 2012 | 23,286 | 2011 | 22,379 | 2010 | 21,453 | 2009 | 20,418 | 2008 | 19,207 | 2007 | 17,984 | 2006 | 16,931 | 2005 | 16,142 | 2004 | 15,521 | 2003 | 14,976 | 2002 | 14,566 | 2001 | 14,347 | 2000 | 14,278 | 1999 | 14,351 | 1998 | 14,631 | 1997 | 15,106 | 1996 | 15,756 | 1995 | 16,699 | 1994 | 17,944 | 1993 | 19,078 | 1992 | 19,788 | 1991 | 20,069 | 1990 | 20,090 | 1989 | 19,903 | 1988 | 19,377 | 1987 | 18,605 | 1986 | 17,687 | 1985 | 16,805 | 1984 | 16,068 | 1983 | 15,369 | 1982 | 14,702 | 1981 | 14,218 | 1980 | 13,944 | 1979 | 13,806 | 1978 | 13,812 | 1977 | 13,913 | 1976 | 14,060 | 1975 | 14,194 | 1974 | 14,216 | 1973 | 14,127 | 1972 | 14,007 | 1971 | 13,874 | 1970 | 13,778 | 1969 | 13,750 | 1968 | 13,688 | 1967 | 13,531 | 1966 | 13,335 | 1965 | 13,117 | 1964 | 12,782 | 1963 | 12,425 | 1962 | 12,173 | 1961 | 11,894 | 1960 | 11,522 |
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