Year High Low
2018 34.5 15.7
2017 36 19
2016 40 21.25
2015 39.7 19.5
2014 39.5 13.85
2013 21.05 11.15
2012 24.25 13.6
2011 24.8 13.51
2010 24.9 15.5
2009 23.7 7.4
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