Year	% (cumulative)
1970	9.97482967376709
1975	11.4878797531128
1980	14.1838502883911
1985	18.0799503326416
1990	19.9029293060303
1995	28.6286792755127
2000	30.6495990753174
2003	37.1579704284668
2004	38.2164840698242
2005	38.5808181762695
2006	40.4496421813965
2007	41.8502922058105
2008	43.1608963012695
2009	33.4011611938477
2010	40.8311996459961
2011	46.3700790405273
2012	47.112419128418
2013	48.1300163269043
2014	49.1062240600586
2015	45.1205101013184
2016	50.2355842590332
2017	50.6431159973145
2018	51.3774566650391
2019	51.8208961486816
2020	52.1812782287598
2021	52.5475425720215
2022	52.8652153015137