| Year | Value | | 2022 | 78,742 | | 2021 | 79,397 | | 2020 | 79,271 | | 2019 | 77,621 | | 2018 | 74,245 | | 2017 | 70,124 | | 2016 | 65,621 | | 2015 | 61,045 | | 2014 | 56,648 | | 2013 | 52,573 | | 2012 | 48,852 | | 2011 | 45,465 | | 2010 | 42,403 | | 2009 | 39,684 | | 2008 | 37,279 | | 2007 | 35,080 | | 2006 | 33,014 | | 2005 | 31,050 | | 2004 | 29,226 | | 2003 | 27,620 | | 2002 | 26,284 | | 2001 | 25,213 | | 2000 | 24,349 | | 1999 | 23,447 | | 1998 | 22,447 | | 1997 | 21,492 | | 1996 | 20,591 | | 1995 | 19,738 | | 1994 | 18,928 | | 1993 | 18,206 | | 1992 | 17,555 | | 1991 | 16,909 | | 1990 | 16,271 | | 1989 | 15,639 | | 1988 | 15,003 | | 1987 | 14,349 | | 1986 | 13,631 | | 1985 | 12,805 | | 1984 | 11,883 | | 1983 | 10,752 | | 1982 | 9,685 | | 1981 | 8,918 | | 1980 | 8,291 | | 1979 | 7,802 | | 1978 | 7,585 | | 1977 | 7,634 | | 1976 | 7,840 | | 1975 | 8,135 | | 1974 | 8,429 | | 1973 | 8,746 | | 1972 | 9,085 | | 1971 | 9,432 | | 1970 | 9,764 | | 1969 | 10,012 | | 1968 | 10,032 | | 1967 | 9,867 | | 1966 | 9,677 | | 1965 | 9,484 | | 1964 | 9,286 | | 1963 | 9,083 | | 1962 | 8,878 | | 1961 | 8,692 | | 1960 | 8,536 |
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