Year	% (cumulative)
1975	11.5263700485229
1980	16.0403995513916
1984	21.3632106781006
2008	44.4610404968262
2010	46.1373596191406
2011	47.3552703857422
2012	46.6023597717285
2016	50.0747604370117
2018	47.2414093017578
2019	47.9551887512207