Year | Value | 2022 | 31,321 | 2021 | 30,656 | 2020 | 29,977 | 2019 | 29,302 | 2018 | 28,631 | 2017 | 27,982 | 2016 | 27,341 | 2015 | 26,715 | 2014 | 26,145 | 2013 | 25,656 | 2012 | 25,233 | 2011 | 24,853 | 2010 | 24,489 | 2009 | 24,112 | 2008 | 23,722 | 2007 | 23,318 | 2006 | 22,883 | 2005 | 22,421 | 2004 | 21,948 | 2003 | 21,458 | 2002 | 20,946 | 2001 | 20,416 | 2000 | 19,871 | 1999 | 19,355 | 1998 | 18,877 | 1997 | 18,414 | 1996 | 17,985 | 1995 | 17,588 | 1994 | 17,147 | 1993 | 16,613 | 1992 | 16,023 | 1991 | 15,390 | 1990 | 14,713 | 1989 | 14,054 | 1988 | 13,457 | 1987 | 12,885 | 1986 | 12,310 | 1985 | 11,735 | 1984 | 11,167 | 1983 | 10,633 | 1982 | 10,131 | 1981 | 9,628 | 1980 | 9,146 | 1979 | 8,724 | 1978 | 8,358 | 1977 | 8,053 | 1976 | 7,838 | 1975 | 7,679 | 1974 | 7,532 | 1973 | 7,375 | 1972 | 7,200 | 1971 | 7,013 | 1970 | 6,860 | 1969 | 6,723 | 1968 | 6,563 | 1967 | 6,412 | 1966 | 6,271 | 1965 | 6,142 | 1964 | 6,033 | 1963 | 5,942 | 1962 | 5,858 | 1961 | 5,774 | 1960 | 5,683 |
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