Year	scale 0 - 100
2004	79.40476202380952
2005	81.42851190476189
2006	81.54758928571425
2007	81.38637159292031
2008	81.56336256637174
2009	81.72508766081867
2010	82.61690099415202
2011	82.95321631578945
2012	82.39766058479533
2013	80.5028735632184
2014	79.64367816091958
2015	80.99718119658118
2016	81.42452649572647
2017	83.30485641025638
2018	83.70372649572653
2019	82.64959316239319
2020	81.48150170940171