Year FourseamSinkerChangeCurve
2009 98.94 97.56 90.44 83.48
2010 97.85 96.95 89.98 82.58
2011 96.79 95.59 89.71 80.10
2012 96.78 95.98 89.62 81.38
2013 96.54 95.80 89.34 81.04