| Year | Value | | 2024 | 1,116 | | 2023 | 1,114 | | 2022 | 1,107 | | 2021 | 1,098 | | 2020 | 1,079 | | 2019 | 1,042 | | 2018 | 1,004 | | 2017 | 994 | | 2016 | 1,015 | | 2015 | 1,047 | | 2014 | 1,059 | | 2013 | 1,051 | | 2012 | 1,047 | | 2011 | 1,034 | | 2010 | 1,017 | | 2009 | 1,033 | | 2008 | 1,065 | | 2007 | 1,089 | | 2006 | 1,095 | | 2005 | 1,086 | | 2004 | 1,069 | | 2003 | 1,050 | | 2002 | 1,041 | | 2001 | 1,042 | | 2000 | 1,043 | | 1999 | 1,041 | | 1998 | 1,040 | | 1997 | 1,030 | | 1996 | 1,006 | | 1995 | 976 | | 1994 | 946 | | 1993 | 914 | | 1992 | 890 | | 1991 | 883 | | 1990 | 887 | | 1989 | 891 | | 1988 | 885 | | 1987 | 862 | | 1986 | 827 | | 1985 | 792 | | 1984 | 758 | | 1983 | 730 | | 1982 | 710 | | 1981 | 693 | | 1980 | 679 | | 1979 | 668 | | 1978 | 659 | | 1977 | 650 | | 1976 | 635 | | 1975 | 610 |
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