Year 1=low to 6=high 2005 3.5625 2006 3.5 2007 3.75 2008 3.75 2009 3.8125 2010 3.8125 2011 3.8125 2012 3.8125 2013 3.75 2014 3.75 2015 3.6875 2016 3.642857142857143 2017 3.642857142857143 2018 3.642857142857143 2019 3.5714285714285716 2020 3.5714285714285716 2021 3.5 2022 3.5 2023 3.5