Year	% (cumulative)
1981	55.4109001159668
1991	60.464729309082
2014	77.3197937011719
2015	77.753044128418
2016	78.9200744628906
2017	80.6394119262695
2018	81.9472961425781
2019	81.5637664794922
2020	82.0300521850586