Year	% (cumulative)
1981	4.90000009536743
2006	15.051830291748
2007	17.0739803314209
2008	17.4270992279053
2010	18.6593894958496
2014	21.8021202087402
2015	23.0014591217041
2016	20.3152694702148
2017	24.9866828918457
2018	25.324499130249
2019	25.6500492095947
2020	26.3395404815674
2021	28.3293170928955
2022	29.1270961761475