Year	% (cumulative)
1974	7.6950798034668
1981	12.86266040802
2001	26.714729309082
2011	35.2979698181152
2012	36.0457382202148
2013	33.7053489685059
2014	34.9157295227051
2015	40.8408012390137
2016	41.5008010864258
2017	42.6180801391602
2018	43.6428413391113
2019	44.6835517883301
2021	48.6499214172363