Year	% (cumulative)
1971	7.9289698600769
2006	30.3977870941162
2007	31.6042976379395
2008	30.6981220245361
2009	31.4906005859375
2010	33.7010917663574
2011	33.0590400695801
2012	36.9503593444824
2013	37.8567390441895
2014	38.9803009033203
2015	39.7894134521484
2016	40.5749015808105
2017	44.0941696166992
2018	41.593090057373
2019	42.9992599487305
2020	47.2437782287598
2021	48.6701393127441