| Year | Value | | 2022 | 37,618 | | 2021 | 36,098 | | 2020 | 34,952 | | 2019 | 33,776 | | 2018 | 32,231 | | 2017 | 30,758 | | 2016 | 29,316 | | 2015 | 27,853 | | 2014 | 26,375 | | 2013 | 24,901 | | 2012 | 23,415 | | 2011 | 21,920 | | 2010 | 20,454 | | 2009 | 19,076 | | 2008 | 17,838 | | 2007 | 16,784 | | 2006 | 15,943 | | 2005 | 15,275 | | 2004 | 14,699 | | 2003 | 14,144 | | 2002 | 13,573 | | 2001 | 12,986 | | 2000 | 12,397 | | 1999 | 11,829 | | 1998 | 11,326 | | 1997 | 10,886 | | 1996 | 10,471 | | 1995 | 10,077 | | 1994 | 9,698 | | 1993 | 9,328 | | 1992 | 8,957 | | 1991 | 8,585 | | 1990 | 8,216 | | 1989 | 7,851 | | 1988 | 7,496 | | 1987 | 7,154 | | 1986 | 6,826 | | 1985 | 6,515 | | 1984 | 6,215 | | 1983 | 5,921 | | 1982 | 5,640 | | 1981 | 5,382 | | 1980 | 5,148 | | 1979 | 4,947 | | 1978 | 4,785 | | 1977 | 4,642 | | 1976 | 4,506 | | 1975 | 4,373 | | 1974 | 4,244 | | 1973 | 4,118 | | 1972 | 4,015 | | 1971 | 3,907 | | 1970 | 3,761 | | 1969 | 3,607 | | 1968 | 3,447 | | 1967 | 3,283 | | 1966 | 3,129 | | 1965 | 2,998 | | 1964 | 2,888 | | 1963 | 2,796 | | 1962 | 2,717 | | 1961 | 2,637 | | 1960 | 2,549 |
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