Year	% (cumulative)
1991	40.8521499633789
2001	71.27294921875
2006	72.357177734375
2011	65.6090774536133
2012	66.7768783569336
2014	67.1105499267578
2015	67.5022964477539
2016	68.3189926147461
2017	71.4877090454102
2018	73.2137298583984
2019	73.1619033813477
2020	74.5652389526367