| Year | Value | | 2022 | 13,182 | | 2021 | 12,745 | | 2020 | 12,240 | | 2019 | 11,743 | | 2018 | 11,316 | | 2017 | 10,899 | | 2016 | 10,516 | | 2015 | 10,202 | | 2014 | 9,965 | | 2013 | 9,790 | | 2012 | 9,673 | | 2011 | 9,540 | | 2010 | 9,378 | | 2009 | 9,252 | | 2008 | 9,155 | | 2007 | 9,071 | | 2006 | 9,001 | | 2005 | 8,964 | | 2004 | 8,968 | | 2003 | 9,014 | | 2002 | 9,077 | | 2001 | 9,111 | | 2000 | 9,018 | | 1999 | 8,789 | | 1998 | 8,507 | | 1997 | 8,199 | | 1996 | 7,881 | | 1995 | 7,558 | | 1994 | 7,234 | | 1993 | 6,927 | | 1992 | 6,658 | | 1991 | 6,433 | | 1990 | 6,217 | | 1989 | 6,102 | | 1988 | 6,084 | | 1987 | 6,045 | | 1986 | 5,993 | | 1985 | 5,951 | | 1984 | 5,826 | | 1983 | 5,617 | | 1982 | 5,428 | | 1981 | 5,266 | | 1980 | 5,107 | | 1979 | 4,943 | | 1978 | 4,781 | | 1977 | 4,627 | | 1976 | 4,482 | | 1975 | 4,358 | | 1974 | 4,251 | | 1973 | 4,150 | | 1972 | 4,046 | | 1971 | 3,930 | | 1970 | 3,773 | | 1969 | 3,553 | | 1968 | 3,296 | | 1967 | 3,028 | | 1966 | 2,753 | | 1965 | 2,473 | | 1964 | 2,200 | | 1963 | 1,956 | | 1962 | 1,777 | | 1961 | 1,710 | | 1960 | 1,872 |
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