Year	SPI (scale 0-100)
2005	43.025
2006	43.0625
2007	47.225
2008	47.0875
2009	47.0875
2010	42.20625
2011	41.225
2012	44.03125
2013	44.08125
2014	53.64375
2015	52.1875
2016	55.81875
2017	52.8625
2018	55.93125
2019	57.06875
2020	62.8875
2021	76.5625
2022	76.5625