Year	% (cumulative)
1970	53.861499786377
1985	78.1149368286133
1990	82.6999969482422
1995	84.1190567016602
2000	87.3397674560547
2003	89.4063262939453
2004	90.102897644043
2005	89.5769119262695
2006	91.1667556762695
2007	91.6677551269531
2008	91.9642105102539
2009	86.2607879638672
2010	91.2238693237305
2011	92.9375228881836
2012	93.4231491088867
2013	93.7821884155273
2014	94.2463531494141
2015	92.8199920654297
2016	94.6215133666992
2017	94.6846466064453
2018	94.9011459350586
2019	95.0458526611328
2020	95.2037124633789
2021	95.5400314331055
2022	95.8029098510742