Year	% (cumulative)
1972	25.0997905731201
2005	44.3944892883301
2006	59.9758987426758
2007	54.5076103210449
2008	59.6078681945801
2009	59.4455909729004
2010	60.7559013366699
2011	61.4873886108398
2012	60.7747192382812
2013	61.4999504089355
2014	62.516300201416
2015	60.9518890380859
2016	95.7093811035156
2017	60.4323997497559
2018	47.2339706420898
2019	55.1207389831543
2021	62.9245910644531