Year	SPI (scale 0-100)
2004	20
2005	20
2006	20
2007	20
2008	20
2009	20
2010	30
2011	30
2012	30
2013	30
2014	30
2015	40
2016	46.6
2017	46.6
2018	53.4
2019	60
2020	56.6
2021	56.6
2022	56.6