Year	% (cumulative)
1970	15.8830795288086
1975	23.3999996185303
1980	33.6324005126953
1990	57.5
1995	62.9889488220215
2000	69.5789337158203
2003	72.1886901855469
2004	72.9736862182617
2005	74.0785903930664
2006	74.8660278320312
2007	75.7657012939453
2008	76.4313888549805
2009	70.9930114746094
2010	77.0506362915039
2011	77.8335952758789
2012	78.5920562744141
2013	79.3877563476562
2014	80.3419418334961
2015	80.3451690673828
2016	81.8187789916992
2017	82.1929702758789
2018	82.4144973754883
2019	82.7603378295898
2020	83.0876922607422
2021	83.6950988769531
2022	84.0698394775391