Year	% (cumulative)
1972	1.98784995079041
1982	3.35188007354736
1992	7.5485200881958
2003	7.99952983856201
2005	4.51313018798828
2006	3.74461007118225
2007	8.69509983062744
2008	10.422459602356
2009	9.80848026275635
2012	10.8557195663452
2013	13.665060043335
2014	13.6463804244995
2015	14.5206499099731
2016	14.0451498031616
2018	15.2228899002075
2019	16.194299697876
2020	15.9307298660278