Year SPI (scale 0-100) 2005 5.41875 2006 5.41875 2007 5.41875 2008 5.41875 2009 5.41875 2010 5.11875 2011 5.11875 2012 4.89375 2013 4.89375 2014 4.89375 2015 4.89375 2016 4.89375 2017 5.85625 2018 6.41875 2019 7.05625 2020 13.91875 2021 13.56875 2022 13.56875