Year SPI (scale 0-100) 2004 20 2005 20 2006 20 2007 20 2008 20 2009 20 2010 20 2011 20 2012 20 2013 20 2014 20 2015 60 2016 66.6 2017 86.6 2018 86.6 2019 100 2020 100 2021 100 2022 100