Year 1=low to 6=high 2005 3.875 2006 3.8125 2007 3.875 2008 3.75 2009 3.6875 2010 3.75 2011 3.5625 2012 3.5 2013 3.5 2014 3.5 2015 3.4375 2016 3.5714285714285716 2017 3.2142857142857144 2018 3.0714285714285716 2019 2.9285714285714284 2020 2.9285714285714284 2021 2.9285714285714284 2022 2.9285714285714284 2023 2.9285714285714284