Year	SPI (scale 0-100)
2005	40.325
2006	40.26875
2007	40.65625
2008	40.51875
2009	37.81875
2010	40.63125
2011	43.2125
2012	43.55625
2013	42.975
2014	43.29375
2015	50.9875
2016	51.10625
2017	51.45
2018	52.5
2019	52.35
2020	62.46875
2021	75.84375
2022	75.84375