Year	% (cumulative)
1972	10.6999998092651
1981	12.3594903945923
2005	21.4212493896484
2006	32.4579086303711
2007	28.3991527557373
2008	32.430591583252
2009	32.2032508850098
2010	33.3851013183594
2011	33.3889007568359
2012	34.9753608703613
2013	35.4273300170898
2014	37.3312797546387
2015	34.9926376342773
2016	70.2046051025391
2017	36.4315299987793
2018	19.9216003417969
2019	25.7791996002197
2021	38.0757026672363