Year	% (cumulative)
1981	34.2488288879395
2001	74.8149490356445
2008	73.931022644043
2009	74.0255737304688
2010	57.4031562805176
2011	58.9283676147461
2013	61.4281883239746
2014	62.4378852844238
2015	63.2838249206543
2016	81.6128005981445
2017	82.2686233520508
2018	82.865966796875
2019	81.0301971435547
2020	84.089599609375
2021	81.8481292724609
2022	82.0182418823242