Year	% (cumulative)
1975	53.3889083862305
2003	91.2440338134766
2006	82.948371887207
2008	85.4300003051758
2009	85.4199981689453
2010	85.6699981689453
2011	87.3899993896484
2012	88.1699981689453
2013	88.5699996948242
2014	89.120002746582
2015	89.379997253418
2016	89.8499984741211
2017	90.1999969482422
2018	91.0999984741211
2019	91.3300018310547
2021	92.0899963378906
2022	92.8600006103516