Year	% (cumulative)
1975	27.0245704650879
1992	86.764518737793
2001	97.9336700439453
2006	98.7333755493164
2007	98.844367980957
2008	98.8131561279297
2009	99.0317687988281
2010	99.087532043457
2011	99.0650634765625
2012	99.2179489135742
2013	99.1778564453125
2014	99.104606628418
2015	99.2149124145508
2016	99.2260513305664
2017	99.2667770385742
2018	99.2054443359375
2019	99.3482055664062
2020	99.3613510131836
2021	99.3213653564453
2022	99.2939758300781