| Year | Value | | 2022 | 40,204 | | 2021 | 39,496 | | 2020 | 38,615 | | 2019 | 37,240 | | 2018 | 35,675 | | 2017 | 34,120 | | 2016 | 32,585 | | 2015 | 31,151 | | 2014 | 29,818 | | 2013 | 28,517 | | 2012 | 27,254 | | 2011 | 26,035 | | 2010 | 24,870 | | 2009 | 23,793 | | 2008 | 22,806 | | 2007 | 21,891 | | 2006 | 21,037 | | 2005 | 20,249 | | 2004 | 19,532 | | 2003 | 18,874 | | 2002 | 18,272 | | 2001 | 17,707 | | 2000 | 17,155 | | 1999 | 16,610 | | 1998 | 16,049 | | 1997 | 15,461 | | 1996 | 14,851 | | 1995 | 14,221 | | 1994 | 13,570 | | 1993 | 12,899 | | 1992 | 12,213 | | 1991 | 11,523 | | 1990 | 10,837 | | 1989 | 10,167 | | 1988 | 9,528 | | 1987 | 8,929 | | 1986 | 8,368 | | 1985 | 7,848 | | 1984 | 7,375 | | 1983 | 6,946 | | 1982 | 6,552 | | 1981 | 6,188 | | 1980 | 5,856 | | 1979 | 5,557 | | 1978 | 5,298 | | 1977 | 5,087 | | 1976 | 4,908 | | 1975 | 4,749 | | 1974 | 4,611 | | 1973 | 4,484 | | 1972 | 4,374 | | 1971 | 4,284 | | 1970 | 4,203 | | 1969 | 4,135 | | 1968 | 4,073 | | 1967 | 4,012 | | 1966 | 3,954 | | 1965 | 3,899 | | 1964 | 3,843 | | 1963 | 3,780 | | 1962 | 3,717 | | 1961 | 3,656 | | 1960 | 3,603 |
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