Year	SPI (scale 0-100)
2005	44.26875
2006	43.475
2007	44.425
2008	44.775
2009	46.09375
2010	47.125
2011	50.75
2012	53.14375
2013	52.375
2014	52.725
2015	68.11875
2016	70.1875
2017	75.48125
2018	75.3625
2019	74.5875
2020	77.11875
2021	84.38125
2022	84.38125