Year	% (cumulative)
1970	64.0802764892578
1985	84.5792465209961
1990	88.1999969482422
1995	89.3580932617188
2000	91.6591491699219
2003	93.3766479492188
2004	93.8581619262695
2005	93.0696411132812
2006	94.5931930541992
2007	94.9577178955078
2008	95.1002807617188
2009	90.9840087890625
2010	94.3045272827148
2011	95.7397689819336
2012	96.0725631713867
2013	96.2655029296875
2014	96.5232849121094
2015	95.5062866210938
2016	96.7117233276367
2017	96.7661743164062
2018	96.9526138305664
2019	97.0582046508789
2020	97.1387786865234
2021	97.2863693237305
2022	97.459587097168