Year	% (cumulative)
1970	11.6018695831299
1981	16.957649230957
1991	25.0335102081299
1998	25.2855396270752
1999	25.8375301361084
2000	26.5029697418213
2001	27.708309173584
2002	28.6121597290039
2003	30.3304901123047
2004	32.95166015625
2005	34.3893089294434
2006	35.9612808227539
2007	36.1753883361816
2008	38.1790618896484
2009	40.2649116516113
2010	41.5602493286133
2011	45.1360816955566
2012	47.2972106933594
2013	49.8210411071777
2014	52.2231216430664
2015	53.4353485107422
2016	54.8442802429199
2017	56.1133995056152
2018	54.814079284668
2019	58.5876083374023
2020	61.923168182373
2021	65.305793762207
2022	65.3792190551758