Year SPI (scale 0-100) 2005 68.775 2006 68.675 2007 69.375 2008 71.85 2009 71.85 2010 70.5375 2011 74.18125 2012 75.325 2013 73.2 2014 73.60625 2015 74.9375 2016 73.98125 2017 75.2 2018 75.5125 2019 75.95625 2020 86.38125 2021 93.0875 2022 93.0875