Year FourseamSinkerChangeCurve
2009 98.94 97.56 90.44 83.48
2010 97.82 96.92 89.94 82.55
2011 96.65 95.47 89.58 79.98
2012 96.68 95.88 89.53 81.28
2013 96.41 95.61 89.19 80.91