Year	SPI (scale 0-100)
2005	41.36875
2006	40.375
2007	40.0375
2008	40.45625
2009	41.15625
2010	39.55
2011	39.79375
2012	40.3125
2013	40.9375
2014	41.5125
2015	47.34375
2016	52.375
2017	61.025
2018	59.55
2019	58.4625
2020	64.45625
2021	70.8875
2022	70.8875