Year	% (cumulative)
1970	5.08215999603271
1980	6.9764199256897
1990	10.1024904251099
2001	12.6446399688721
2005	14.6927499771118
2009	18.7380695343018
2010	18.9934902191162
2011	20.026969909668
2012	21.0102405548096
2013	21.4570903778076
2014	20.8776302337646
2015	21.6743507385254
2016	21.3962898254395
2017	21.7270374298096
2018	22.7498626708984
2019	23.5781879425049
2020	24.9986801147461
2021	26.6312389373779
2022	26.8596343994141