| Year | Value | | 2024 | 141 | | 2023 | 130 | | 2022 | 123 | | 2021 | 118 | | 2020 | 114 | | 2019 | 111 | | 2018 | 103 | | 2017 | 93 | | 2016 | 85 | | 2015 | 82 | | 2014 | 79 | | 2013 | 76 | | 2012 | 72 | | 2011 | 72 | | 2010 | 71 | | 2009 | 69 | | 2008 | 68 | | 2007 | 68 | | 2006 | 68 | | 2005 | 69 | | 2004 | 72 | | 2003 | 75 | | 2002 | 79 | | 2001 | 84 | | 2000 | 85 | | 1999 | 82 | | 1998 | 81 | | 1997 | 79 | | 1996 | 74 | | 1995 | 72 | | 1994 | 71 | | 1993 | 69 | | 1992 | 68 | | 1991 | 65 | | 1990 | 64 | | 1989 | 61 | | 1988 | 57 | | 1987 | 54 | | 1986 | 50 | | 1985 | 49 | | 1984 | 50 | | 1983 | 48 | | 1982 | 46 | | 1981 | 44 | | 1980 | 45 | | 1979 | 46 | | 1978 | 48 | | 1977 | 49 | | 1976 | 51 | | 1975 | 53 |
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