Year	% (cumulative)
1972	1.60000002384186
1981	0.760259985923767
2005	2.10417008399963
2006	3.52049994468689
2007	3.23870253562927
2008	3.65621995925903
2009	4.50910997390747
2010	4.73928022384644
2011	4.57596015930176
2012	4.91368007659912
2013	5.22017002105713
2014	6.08884000778198
2015	6.03219413757324
2016	16.7618560791016
2017	6.16782999038696
2018	2.65594005584717
2019	3.66774988174438
2021	7.08136034011841