Year	% (cumulative)
1974	7.20382022857666
2001	20.25
2004	19.0300006866455
2005	19.3700008392334
2006	20.4139766693115
2007	18.9206695556641
2008	21.4510231018066
2009	21.4599990844727
2010	22.6499996185303
2011	23.9899997711182
2012	22.5400009155273
2013	23.9099998474121
2014	28.2399997711182
2015	27.5699996948242
2016	30.0200004577637
2017	25.9116840362549
2018	27.5100002288818
2019	30.7800006866455