Year SPI (scale 0-100) 2004 20 2005 20 2006 20 2007 20 2008 20 2009 20 2010 30 2011 30 2012 50 2013 50 2014 50 2015 70 2016 90 2017 80 2018 80 2019 80 2020 60 2021 50 2022 50