Year	scale 0 - 100
2004	80.9401712820513
2005	82.47846179487179
2006	83.41871846153846
2007	83.33316256410257
2008	83.50410205128203
2009	83.2498325
2010	83.04150050000001
2011	83.50000050000001
2012	82.74999975
2013	79.1869918699187
2014	78.13821138211384
2015	78.2927
2016	81.62602682926831
2017	82.60163170731708
2018	83.65854634146343
2019	82.6016341463415
2020	81.46342439024392