Year	% (cumulative)
1980	31.416919708252
1990	42.9415817260742
1997	51.2433242797852
2000	50.7400016784668
2001	46.9199981689453
2002	47.5099983215332
2003	49.0499992370605
2004	50.4700012207031
2005	50.939998626709
2006	52.0299987792969
2007	52.7799987792969
2008	54.7400016784668
2009	55.2799987792969
2010	60.0699996948242
2011	55.7999992370605
2013	58.7999992370605
2014	59.5400009155273
2015	59.8600006103516
2016	61.2599983215332
2017	61.3199996948242
2018	61.2900009155273
2019	62.939998626709
2021	65.6100006103516
2022	65.9000015258789
2023	65.2894134521484