Year	% (cumulative)
1980	54.6744499206543
1990	66.5942916870117
1997	74.194450378418
2000	81.7200012207031
2001	77.8199996948242
2002	79.3600006103516
2003	80.1699981689453
2004	80.5899963378906
2005	80.9000015258789
2006	81.3099975585938
2007	81.3499984741211
2008	82.6500015258789
2009	82.5100021362305
2010	82.4854965209961
2011	82.9199981689453
2013	84.4599990844727
2014	84.9899978637695
2015	85.4300003051758
2016	85.9499969482422
2017	86.2799987792969
2018	86.2699966430664
2019	87.4499969482422
2021	88.379997253418
2022	88.2799987792969
2023	88.325569152832