| Year | Value | | 2022 | 15,382 | | 2021 | 14,942 | | 2020 | 14,477 | | 2019 | 14,015 | | 2018 | 13,581 | | 2017 | 13,176 | | 2016 | 12,788 | | 2015 | 12,408 | | 2014 | 12,010 | | 2013 | 11,565 | | 2012 | 11,061 | | 2011 | 10,501 | | 2010 | 10,009 | | 2009 | 9,622 | | 2008 | 9,257 | | 2007 | 8,915 | | 2006 | 8,581 | | 2005 | 8,236 | | 2004 | 7,864 | | 2003 | 7,467 | | 2002 | 7,039 | | 2001 | 6,583 | | 2000 | 6,105 | | 1999 | 5,631 | | 1998 | 5,205 | | 1997 | 4,855 | | 1996 | 4,591 | | 1995 | 4,402 | | 1994 | 4,250 | | 1993 | 4,091 | | 1992 | 3,909 | | 1991 | 3,710 | | 1990 | 3,522 | | 1989 | 3,357 | | 1988 | 3,217 | | 1987 | 3,112 | | 1986 | 3,049 | | 1985 | 3,022 | | 1984 | 3,009 | | 1983 | 2,993 | | 1982 | 2,953 | | 1981 | 2,881 | | 1980 | 2,791 | | 1979 | 2,697 | | 1978 | 2,618 | | 1977 | 2,560 | | 1976 | 2,521 | | 1975 | 2,495 | | 1974 | 2,467 | | 1973 | 2,416 | | 1972 | 2,334 | | 1971 | 2,220 | | 1970 | 2,089 | | 1969 | 1,970 | | 1968 | 1,882 | | 1967 | 1,823 | | 1966 | 1,779 | | 1965 | 1,741 | | 1964 | 1,699 | | 1963 | 1,645 | | 1962 | 1,580 | | 1961 | 1,508 | | 1960 | 1,435 |
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