Year	% (cumulative)
1970	95.0335388183594
1980	96.6446304321289
1994	99.4179458618164
1995	99.4459762573242
1996	99.4293518066406
1997	99.4703063964844
1998	99.4754180908203
1999	99.4878005981445
2000	99.5083160400391
2001	99.4881591796875
2002	99.5175552368164
2003	99.5161361694336
2004	98.7111282348633
2005	98.4959030151367
2006	98.6378631591797
2007	99.5919418334961
2008	98.7320098876953
2009	98.6214904785156
2010	98.7053909301758
2011	98.7037734985352
2012	98.8281402587891
2013	98.8688430786133
2014	98.7663803100586
2015	98.7678298950195
2016	98.8974685668945
2017	97.5888366699219
2018	98.9852600097656
2019	99.6304473876953
2020	99.0882110595703
2021	97.3503875732422
2022	99.0954437255859
2023	99.6151351928711