Year	% (cumulative)
1972	16.3999996185303
2005	30.3041801452637
2006	45.9336204528809
2007	40.1089630126953
2008	45.5110282897949
2009	44.9611892700195
2010	46.2397499084473
2011	48.5546684265137
2012	47.6898803710938
2013	48.5395317077637
2014	49.8061408996582
2015	47.7790756225586
2016	95.8576202392578
2017	48.8252105712891
2018	38.9729995727539
2019	49.5546798706055
2021	50.4628562927246