Year	% (cumulative)
1975	52.0612487792969
2003	90.6601715087891
2006	82.6457366943359
2008	85.0500030517578
2009	84.8899993896484
2010	85.3099975585938
2011	87.0999984741211
2012	87.6999969482422
2013	88.4800033569336
2014	88.6500015258789
2015	89.0999984741211
2016	89.5899963378906
2017	90
2018	90.7699966430664
2019	91.0299987792969
2021	91.5699996948242
2022	92.4000015258789