Year SPI (scale 0-100) 2004 20 2005 20 2006 20 2007 20 2008 20 2009 20 2010 40 2011 40 2012 40 2013 40 2014 20 2015 50 2016 70 2017 70 2018 80 2019 80 2020 80 2021 60 2022 60