Year	SPI (scale 0-100)
2005	39.00625
2006	39.7875
2007	40.83125
2008	41.08125
2009	38.8125
2010	48.45
2011	52.66875
2012	53.91875
2013	52.8875
2014	51.8
2015	49.425
2016	45.8375
2017	45.84375
2018	45.39375
2019	44.88125
2020	51.96875
2021	58.7125
2022	58.7125