Year | Value | 2022 | 23,503 | 2021 | 23,353 | 2020 | 23,189 | 2019 | 23,002 | 2018 | 22,792 | 2017 | 22,547 | 2016 | 22,258 | 2015 | 21,893 | 2014 | 21,438 | 2013 | 20,889 | 2012 | 20,237 | 2011 | 19,503 | 2010 | 18,739 | 2009 | 18,111 | 2008 | 17,639 | 2007 | 17,238 | 2006 | 16,915 | 2005 | 16,633 | 2004 | 16,350 | 2003 | 16,083 | 2002 | 15,849 | 2001 | 15,640 | 2000 | 15,484 | 1999 | 15,362 | 1998 | 15,231 | 1997 | 15,100 | 1996 | 14,959 | 1995 | 14,788 | 1994 | 14,585 | 1993 | 14,357 | 1992 | 14,111 | 1991 | 13,853 | 1990 | 13,580 | 1989 | 13,299 | 1988 | 13,005 | 1987 | 12,692 | 1986 | 12,361 | 1985 | 12,020 | 1984 | 11,690 | 1983 | 11,428 | 1982 | 11,250 | 1981 | 11,101 | 1980 | 10,955 | 1979 | 10,540 | 1978 | 9,993 | 1977 | 9,674 | 1976 | 9,441 | 1975 | 9,212 | 1974 | 8,990 | 1973 | 8,770 | 1972 | 8,553 | 1971 | 8,338 | 1970 | 8,122 | 1969 | 7,906 | 1968 | 7,691 | 1967 | 7,475 | 1966 | 7,259 | 1965 | 7,051 | 1964 | 6,849 | 1963 | 6,652 | 1962 | 6,457 | 1961 | 6,265 | 1960 | 6,076 |
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