Year	scale 0 - 100
2004	77.12121181818182
2005	78.7878790909091
2006	78.03030272727273
2007	78.18181818181816
2008	77.57575772727274
2009	78.18181818181819
2010	78.93939409090908
2011	79.99999909090907
2012	78.6363640909091
2013	77.46376811594202
2014	75.28985507246377
2015	79.13046956521738
2016	79.71017826086955
2017	79.56522608695651
2018	81.15945217391304
2019	79.8551
2020	79.42032173913043