Year Fourseam
2007 -2.79
2008 -2.66
2009 -2.20
2010 -2.05
2011 -2.16
2012 -2.16
2013 -1.99
2014 -1.99
2015 -2.10
2016 -2.27
2017 -2.22
2018 -1.88
2019 -1.63
2020 -1.78