Year	% (cumulative)
1970	10.917140007019
2006	55.4673690795898
2007	56.3721809387207
2008	57.6325607299805
2009	59.2774085998535
2010	59.7529106140137
2011	60.8857002258301
2012	61.5574417114258
2013	62.8345489501953
2014	62.2965316772461
2015	64.6968688964844
2016	65.4116516113281
2017	67.6378173828125
2018	69.524787902832
2019	70.5602569580078
2020	72.0858764648438
2021	73.2297515869141
2022	74.0813903808594