Year	SPI (scale 0-100)
2005	34.425
2006	35.075
2007	37.4125
2008	37.0625
2009	39.66875
2010	40.69375
2011	41.29375
2012	42.1875
2013	41.40625
2014	41.85
2015	43.8375
2016	44.61875
2017	46.53125
2018	46.35
2019	45.5
2020	53.3125
2021	65.56875
2022	65.56875