Year | Value | 2022 | 24,553 | 2021 | 24,509 | 2020 | 24,353 | 2019 | 24,000 | 2018 | 23,520 | 2017 | 23,086 | 2016 | 22,704 | 2015 | 22,399 | 2014 | 22,097 | 2013 | 21,657 | 2012 | 21,202 | 2011 | 20,799 | 2010 | 20,459 | 2009 | 20,188 | 2008 | 19,923 | 2007 | 19,699 | 2006 | 19,501 | 2005 | 19,277 | 2004 | 18,954 | 2003 | 18,517 | 2002 | 18,150 | 2001 | 17,885 | 2000 | 17,650 | 1999 | 17,402 | 1998 | 17,143 | 1997 | 16,886 | 1996 | 16,607 | 1995 | 16,145 | 1994 | 15,654 | 1993 | 15,452 | 1992 | 15,230 | 1991 | 14,733 | 1990 | 14,325 | 1989 | 14,038 | 1988 | 13,659 | 1987 | 13,316 | 1986 | 12,961 | 1985 | 12,634 | 1984 | 12,560 | 1983 | 12,503 | 1982 | 12,061 | 1981 | 11,622 | 1980 | 11,627 | 1979 | 11,634 | 1978 | 11,461 | 1977 | 11,312 | 1976 | 11,147 | 1975 | 10,951 | 1974 | 10,708 | 1973 | 10,405 | 1972 | 10,073 | 1971 | 9,772 | 1970 | 9,535 | 1969 | 9,365 | 1968 | 9,273 | 1967 | 9,260 | 1966 | 9,287 | 1965 | 9,307 | 1964 | 9,307 | 1963 | 9,306 | 1962 | 9,299 | 1961 | 9,279 | 1960 | 9,245 |
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