Year	% (cumulative)
1970	5.32161998748779
1981	9.02445983886719
1986	8.31762981414795
1991	9.7534704208374
2004	22.7671298980713
2005	24.4709491729736
2006	24.6710300445557
2007	25.1536407470703
2008	25.4226703643799
2009	25.4659900665283
2010	26.2014198303223
2011	27.018669128418
2012	27.3141193389893
2013	28.5732574462891
2014	29.1039009094238
2015	29.0010795593262
2016	29.3102207183838
2017	30.1995849609375
2018	30.7657108306885
2019	32.0666160583496
2020	32.851261138916
2021	33.7732963562012
2022	33.8117637634277