Year	% (cumulative)
1973	5.77936983108521
2001	13.854905128479
2002	14.2570791244507
2003	14.6349067687988
2004	14.9535055160522
2005	15.9743585586548
2006	16.2683906555176
2007	17.5888500213623
2008	20.4057502746582
2009	20.9174499511719
2010	20.0053997039795
2011	20.5672607421875
2012	20.9871406555176
2014	23.4954795837402
2015	21.9095706939697
2016	21.4458408355713
2018	22.2299098968506
2020	22.2933502197266