Year FourseamChangeCurve
2009 93.74 86.25 79.82
2010 92.12 85.26 78.09
2011 93.24 87.15 79.98
2012 94.16 87.92 80.76
2013 93.90 86.85 80.37
2014 94.16 86.50 80.46