Year SPI (scale 0-100) 2005 51.96875 2006 52.225 2007 53.175 2008 52.825 2009 52.825 2010 53.63125 2011 54.06875 2012 55.31875 2013 55.0875 2014 55.51875 2015 53.54375 2016 53.90625 2017 54.4125 2018 54.6625 2019 53.33125 2020 59.95 2021 70.49375 2022 70.49375