Year	% (cumulative)
1974	1.7775000333786
2005	4.28622055053711
2006	4.13765001296997
2007	7.77154016494751
2008	4.59669780731201
2009	4.55234670639038
2010	5.11710262298584
2011	8.36592960357666
2012	7.20845985412598
2013	5.1402587890625
2014	9.91294956207275
2015	9.67516994476318
2016	11.0028800964355
2017	6.14961528778076
2018	9.37654972076416
2019	8.60871028900146