Year	% (cumulative)
1973	34.7528610229492
2001	74.0926208496094
2002	74.25
2003	75.4700012207031
2004	75.5899963378906
2005	77.2399978637695
2006	76.4499969482422
2007	77.7099990844727
2008	78.6800003051758
2009	79.2099990844727
2010	79
2011	79.7099990844727
2012	79.8499984741211
2013	80.9599990844727
2014	81.1800003051758
2015	80.9300003051758
2016	80.9599990844727
2017	81.5100021362305
2018	81.75
2019	82.7600021362305
2020	82.8899993896484
2021	83.7600021362305
2022	83.8899993896484