Year	% (cumulative)
1970	1.64108002185822
1981	3.47294998168945
1991	7.66812992095947
1998	14.5487804412842
1999	15.2565402984619
2000	15.7724304199219
2001	16.4253997802734
2002	16.7417106628418
2003	18.4442596435547
2004	20.3303508758545
2005	21.3362998962402
2006	22.4099292755127
2007	22.2938194274902
2008	22.7975196838379
2009	24.0550308227539
2010	25.5953102111816
2011	27.8761291503906
2012	30.022819519043
2013	31.8690605163574
2014	34.2075881958008
2015	35.4289283752441
2016	36.7709617614746
2017	37.6235198974609
2018	37.0835800170898
2019	40.678768157959
2020	43.4513092041016
2021	47.285888671875
2022	48.120044708252