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