Year	% (cumulative)
1970	65.6809310913086
1975	91.7852401733398
1979	92.7238235473633
1980	92.7019882202148
1981	92.993766784668
1990	89.6204528808594
1994	91.1790237426758
1995	96.1122055053711
1996	96.2169723510742
1997	96.2803268432617
1998	96.3092193603516
1999	96.4440002441406
2000	96.4144592285156
2001	96.4546127319336
2002	96.4470825195312
2003	96.4871368408203
2004	94.0394287109375
2005	93.6958770751953
2006	94.1919326782227
2007	96.7838363647461
2008	94.4855499267578
2009	94.5352172851562
2010	94.7695007324219
2011	94.9027328491211
2012	94.984489440918
2013	95.2045288085938
2014	95.2634735107422
2015	95.3349685668945
2016	95.5852432250977
2017	94.9176025390625
2018	96.0293731689453
2019	97.6129455566406
2020	96.4607696533203
2021	95.2501678466797
2022	96.4930725097656
2023	97.8486099243164