Year SPI (scale 0-100) 2005 16.8875 2006 16.6875 2007 16.6875 2008 16.6875 2009 16.6875 2010 13.6 2011 13.6 2012 13.15625 2013 13.15625 2014 13.15625 2015 13.3 2016 13.24375 2017 13.99375 2018 14.78125 2019 15.34375 2020 21.1875 2021 22.09375 2022 22.09375