Year SPI (scale 0-100) 2005 57.0625 2006 55.9125 2007 55.9125 2008 56.19375 2009 56.8875 2010 53.3375 2011 54.09375 2012 55.13125 2013 55.19375 2014 54.61875 2015 48.7125 2016 43.9625 2017 44.04375 2018 43.73125 2019 43.1 2020 55.95625 2021 68.675 2022 68.675