Year	% (cumulative)
1980	54.6445808410645
1990	66.8313369750977
1997	73.9672012329102
2000	80.8099975585938
2001	78.1999969482422
2002	78.879997253418
2003	79.25
2004	80.1600036621094
2005	80.9199981689453
2006	82.0199966430664
2007	82.5500030517578
2008	83.4800033569336
2009	83.4100036621094
2010	82.7754669189453
2011	83.4499969482422
2013	84.5299987792969
2014	84.879997253418
2015	85.6800003051758
2016	86.4199981689453
2017	86.5
2018	86.5999984741211
2019	87.5500030517578
2021	88.9800033569336
2022	88.75
2023	88.9113006591797