Year SPI (scale 0-100) 2005 40.975 2006 41.50625 2007 42.89375 2008 46.48125 2009 50.6875 2010 48.3625 2011 50.54375 2012 51.79375 2013 48.3 2014 49.19375 2015 41.9 2016 43.3 2017 44.0875 2018 44.38125 2019 44.05625 2020 54.23125 2021 61.23125 2022 61.23125