Year	% (cumulative)
1971	13.5
2004	59.0876693725586
2005	59.2579498291016
2006	58.9977149963379
2007	62.6643295288086
2008	61.6364288330078
2009	62.0294914245605
2010	62.280101776123
2011	62.5836296081543
2012	63.1811981201172
2013	65.2507705688477
2014	65.2585296630859
2015	65.4841995239258
2016	66.2313690185547
2017	67.2562103271484
2018	67.5942687988281
2019	68.4362258911133
2020	69.7984390258789
2021	71.5337142944336
2022	72.3708648681641