Year SPI (scale 0-100) 2005 37.775 2006 40.01875 2007 40.7125 2008 40.6 2009 40.6 2010 37.8 2011 35.1 2012 35.89375 2013 35.0875 2014 35.9375 2015 39.08125 2016 41.925 2017 42.875 2018 41.01875 2019 41.7875 2020 60.45625 2021 69.625 2022 69.625