Year 1=low to 6=high 2005 3.5625 2006 3.625 2007 3.625 2008 3.6875 2009 3.4375 2010 3.375 2011 3.375 2012 3.375 2013 3.25 2014 3.25 2015 3.25 2016 3.2857142857142856 2017 3.2857142857142856 2018 3.2142857142857144 2019 3.2142857142857144 2020 3.142857142857143 2021 3.142857142857143 2022 3.142857142857143 2023 3.2142857142857144