Year SPI (scale 0-100) 2005 8.34375 2006 8.14375 2007 8.14375 2008 9.53125 2009 9.53125 2010 8.73125 2011 8.73125 2012 9.025 2013 8.9875 2014 7.7375 2015 8.43125 2016 10.9875 2017 11.91875 2018 12.13125 2019 12.94375 2020 20.06875 2021 18.05625 2022 18.05625