Year	% (cumulative)
1970	0.946389973163605
1981	2.22368001937866
1991	7.20783996582031
1998	7.47370004653931
1999	7.5591402053833
2000	7.87352991104126
2001	8.40149974822998
2002	8.90281963348389
2003	10.1406202316284
2004	11.4314203262329
2005	11.626070022583
2006	12.2734003067017
2007	12.6759901046753
2008	13.1587400436401
2009	13.5172100067139
2010	14.4489097595215
2011	15.6173496246338
2012	16.8551597595215
2013	18.0548191070557
2014	19.8992099761963
2015	20.6031093597412
2016	21.4654808044434
2017	21.9352493286133
2018	21.465389251709
2019	23.266960144043
2020	25.446870803833
2021	28.6267070770264
2022	28.8219165802002