Year	% (cumulative)
1981	17.7000007629395
2000	31.0699996948242
2002	31.2736206054688
2006	37.6500015258789
2012	43.3651809692383
2013	44.5458297729492
2014	43.0400009155273
2015	43.4458503723145
2019	50.8050003051758