Year SPI (scale 0-100) 2005 34.95 2006 46.54375 2007 46.43125 2008 46.68125 2009 51.4 2010 48.96875 2011 48.875 2012 52.975 2013 52.48125 2014 49.53125 2015 47.41875 2016 49.2125 2017 45.25625 2018 45.48125 2019 45.1125 2020 68.1375 2021 75.86875 2022 75.86875