Year	% (cumulative)
1970	2.5422101020813
1981	4.92179012298584
1991	8.19369983673096
1998	6.19175004959106
1999	6.62804985046387
2000	6.61672019958496
2001	6.64090013504028
2002	6.34497976303101
2003	7.5997200012207
2004	8.86960983276367
2005	9.11633014678955
2006	9.71245956420898
2007	9.54699039459229
2008	9.81828022003174
2009	10.2387800216675
2010	10.626540184021
2011	12.3984804153442
2012	13.3741502761841
2013	13.3541402816772
2014	14.6799602508545
2015	15.3616504669189
2016	16.1280708312988
2017	16.1338691711426
2018	15.43922996521
2019	17.8543090820312
2020	19.1310806274414
2021	21.1883792877197
2022	21.7715511322021