Year	% (cumulative)
1981	22.2000007629395
2005	53.8540687561035
2006	59.1047286987305
2007	57.2151489257812
2008	57.7264289855957
2010	59.5069885253906
2014	63.6824607849121
2015	65.4486694335938
2016	61.5072402954102
2017	67.7275543212891
2018	68.4870452880859
2019	69.1666412353516
2020	69.8601608276367
2021	72.2298202514648
2022	73.8031158447266