Year	% (cumulative)
1972	11.6000099182129
1981	21.6469192504883
2000	41.7799987792969
2001	42
2002	43.6300010681152
2003	43.2099990844727
2004	45.4700012207031
2005	45.6599998474121
2006	47.060001373291
2007	49.1300010681152
2008	49.5200004577637
2009	50.0400009155273
2010	50.2400016784668
2011	50.1199989318848
2012	52.0400009155273
2013	51.439998626709
2014	51.810001373291
2015	52.689998626709
2016	52.8699989318848
2017	53.4900016784668
2018	54.2000007629395
2019	55.1500015258789
2020	55.2099990844727
2021	54.8300018310547
2022	56.4500007629395