Year	% (cumulative)
1971	16.2999992370605
2004	64.7281494140625
2005	64.9544906616211
2006	64.3517684936523
2007	67.44873046875
2008	66.2211532592773
2009	66.3446197509766
2010	66.7723236083984
2011	66.4095993041992
2012	67.0986328125
2013	69.5296936035156
2014	69.4222030639648
2015	69.570442199707
2016	69.9871978759766
2017	70.5940017700195
2018	71.1049575805664
2019	71.4319534301758
2020	72.9593505859375
2021	73.850830078125
2022	74.0509719848633