Year SPI (scale 0-100) 2005 10.79375 2006 10.59375 2007 10.59375 2008 10.59375 2009 10.59375 2010 10.475 2011 10.475 2012 9.3375 2013 9.3375 2014 9.3375 2015 8.7125 2016 8.68125 2017 8.78125 2018 9.29375 2019 9.9 2020 18.7 2021 18.975 2022 18.975