Year	% (cumulative)
1975	5.87022018432617
1985	7.15103006362915
1996	8.9716796875
2003	7.7179799079895
2006	7.58904981613159
2008	7.45175981521606
2009	7.45342016220093
2010	7.40970993041992
2011	8.62215995788574
2012	8.50368976593018
2013	9.33057975769043
2014	9.54592037200928
2015	9.96759986877441
2016	9.37271022796631
2017	10.4165296554565
2018	10.6137895584106
2019	11.0025196075439