Year SPI (scale 0-100) 2005 12.975 2006 12.975 2007 14.7125 2008 14.65625 2009 14.65625 2010 14.1875 2011 14.39375 2012 11.65625 2013 11.65625 2014 12.08125 2015 10.8875 2016 10.85625 2017 11.86875 2018 12.96875 2019 12.8 2020 22.19375 2021 31.46875 2022 31.46875