Year	% (cumulative)
1980	20.2981605529785
1990	35.8192291259766
2000	43.1699981689453
2002	43.8899993896484
2004	47.4099998474121
2005	50.2348403930664
2006	50.6399993896484
2007	54.986400604248
2008	51.1699981689453
2009	57.3050918579102
2010	54.6800003051758
2012	56.8699989318848
2013	58.5334014892578
2014	59.0900001525879
2015	61.1949310302734
2016	61.3199996948242
2017	62.1886901855469
2018	63.060001373291
2020	65.4000015258789
2022	67.0400009155273