Year	% (cumulative)
1980	2.72135996818542
1990	6.44299983978271
2000	7.22109985351562
2004	10.4169397354126
2005	10.6293601989746
2006	12.4973297119141
2007	11.9819097518921
2008	12.1940898895264
2009	13.1977796554565
2010	13.5404396057129
2012	14.3412599563599
2013	13.5117998123169
2014	13.375280380249
2015	15.3914604187012
2016	14.0081396102905
2017	14.4947595596313
2018	15.3417596817017
2020	18.2847900390625