Year	% (cumulative)
1970	5.22501993179321
1982	8.45623016357422
2004	13.723090171814
2007	16.3533000946045
2008	21.7022495269775
2010	18.2399997711182
2011	15.6433000564575
2012	13.6100873947144
2013	18.018669128418
2014	14.2675924301147
2015	20.3799991607666
2016	14.9400997161865
2017	22.1756992340088
2018	16.6728115081787
2019	16.4490814208984
2020	19.722240447998
2021	20.3219699859619
2022	21.0626277923584