Year	% (cumulative)
1971	9.32452964782715
2006	30.4121780395508
2007	31.2991542816162
2008	30.7467193603516
2009	31.6498508453369
2010	33.5139312744141
2011	34.309398651123
2012	36.5952301025391
2013	37.1599082946777
2014	37.7910308837891
2015	38.7680282592773
2016	39.5638847351074
2017	43.0190582275391
2018	39.7399597167969
2019	41.0556945800781
2020	45.2150115966797
2021	46.7883682250977