Year	% (cumulative)
1970	30.2695598602295
2006	73.9989318847656
2007	74.5823211669922
2008	75.1468124389648
2009	76.4084167480469
2010	77.0858383178711
2011	77.5048370361328
2012	77.673957824707
2013	79.4414901733398
2014	80.1461181640625
2015	82.1870193481445
2016	82.6214370727539
2017	84.722412109375
2018	86.2156219482422
2019	87.210319519043
2020	88.1235656738281
2021	87.8339614868164
2022	88.3022537231445