Year | Value | 2014 | 94.026750523089 | 2013 | 94.356307794625 | 2012 | 95.198646276384 | 2011 | 95.959649705117 | 2010 | 96.350671570267 | 2009 | 96.697905690539 | 2008 | 96.861396371463 | 2007 | 96.992128432097 | 2006 | 97.76798265469 | 2005 | 97.700975923847 | 2004 | 97.707285626902 | 2003 | 97.937378548548 | 2002 | 97.913023272308 | 2001 | 97.896922527534 | 2000 | 97.929278181471 | 1999 | 97.802709453086 | 1998 | 97.826161758664 | 1997 | 97.745826396734 | 1996 | 97.71015780176 | 1995 | 97.496243037007 | 1994 | 99.391823795745 | 1993 | 99.675188537939 | 1992 | 99.649796937062 | 1991 | 99.602327461083 | 1990 | 99.550439817392 | 1989 | 99.521872847415 | 1988 | 99.50242010031 | 1987 | 99.451031038933 | 1986 | 99.352693569519 | 1985 | 99.267693244595 | 1984 | 99.285654120528 | 1983 | 99.35481782172 | 1982 | 99.302764495906 | 1981 | 99.291275433355 | 1980 | 99.276353757421 | 1979 | 98.976859447801 | 1978 | 98.920293121843 | 1977 | 98.891221376715 | 1976 | 98.792404087669 | 1975 | 98.892085948774 | 1974 | 99.308587022581 | 1973 | 98.833429247394 | 1972 | 98.7779947969 | 1971 | 98.446581440378 |
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