| Year | Value | | 2022 | 11,427 | | 2021 | 11,262 | | 2020 | 11,117 | | 2019 | 10,942 | | 2018 | 10,690 | | 2017 | 10,340 | | 2016 | 9,900 | | 2015 | 9,420 | | 2014 | 8,965 | | 2013 | 8,568 | | 2012 | 8,233 | | 2011 | 7,952 | | 2010 | 7,727 | | 2009 | 7,549 | | 2008 | 7,395 | | 2007 | 7,249 | | 2006 | 7,108 | | 2005 | 7,003 | | 2004 | 6,952 | | 2003 | 6,899 | | 2002 | 6,800 | | 2001 | 6,664 | | 2000 | 6,494 | | 1999 | 6,293 | | 1998 | 6,076 | | 1997 | 5,868 | | 1996 | 5,675 | | 1995 | 5,485 | | 1994 | 5,343 | | 1993 | 5,262 | | 1992 | 5,429 | | 1991 | 5,562 | | 1990 | 5,394 | | 1989 | 5,187 | | 1988 | 4,979 | | 1987 | 4,779 | | 1986 | 4,588 | | 1985 | 4,406 | | 1984 | 4,234 | | 1983 | 4,067 | | 1982 | 3,908 | | 1981 | 3,758 | | 1980 | 3,613 | | 1979 | 3,475 | | 1978 | 3,344 | | 1977 | 3,218 | | 1976 | 3,099 | | 1975 | 2,988 | | 1974 | 2,882 | | 1973 | 2,783 | | 1972 | 2,690 | | 1971 | 2,602 | | 1970 | 2,517 | | 1969 | 2,437 | | 1968 | 2,361 | | 1967 | 2,289 | | 1966 | 2,220 | | 1965 | 2,154 | | 1964 | 2,090 | | 1963 | 2,031 | | 1962 | 1,978 | | 1961 | 1,928 | | 1960 | 1,883 |
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