Year	% (cumulative)
1970	32.510181427002
1976	15.4395399093628
1980	17.5269298553467
2001	66.629997253418
2002	68.0100021362305
2003	69.0400009155273
2004	69.3899993896484
2005	70.2699966430664
2006	71.8000030517578
2007	72.7399978637695
2008	73.5100021362305
2009	74.4800033569336
2011	74.7600021362305
2012	76.879997253418
2013	77.2200012207031
2014	77.8099975585938
2015	78.4700012207031
2016	80.7399978637695
2017	82.0400009155273
2018	83.0999984741211
2019	83.3600006103516
2020	85.1399993896484
2021	85.4499969482422
2022	85.120002746582