Year SPI (scale 0-100) 2005 54.325 2006 55.34375 2007 56.04375 2008 59.30625 2009 60.9875 2010 60.14375 2011 60.10625 2012 61.775 2013 58.95 2014 60.70625 2015 55.76875 2016 56.15 2017 59.0625 2018 51.0375 2019 46.13125 2020 59.19375 2021 71.5125 2022 71.5125