Year	% (cumulative)
1973	9.95403957366943
2001	28.407735824585
2002	29.3600006103516
2003	30.3199996948242
2004	29.8299999237061
2005	31.2099990844727
2006	32.0400009155273
2007	32.4599990844727
2008	34.0200004577637
2009	33.7400016784668
2010	33.8499984741211
2011	34.9000015258789
2012	35.5499992370605
2013	36.7999992370605
2014	38.0499992370605
2015	36.5499992370605
2016	36.9599990844727
2017	37.5999984741211
2018	38.4199981689453
2019	39.189998626709
2020	39.7200012207031
2021	41.4799995422363
2022	42.2900009155273