Year	% (cumulative)
1981	58.0787506103516
1991	66.1063766479492
2014	79.1587524414062
2015	79.1648788452148
2016	79.6281967163086
2017	81.1265258789062
2018	82.4127655029297
2019	81.5385589599609
2020	81.804069519043