Year 1=low to 6=high 2005 3.25 2006 3.25 2007 3.25 2008 3.25 2009 3.25 2010 3.25 2011 3 2012 3.25 2013 3.25 2014 3.25 2015 3.25 2016 3 2017 2.75 2018 3 2019 3 2020 3 2021 3 2022 3 2023 3