Year	% (cumulative)
1999	32.5963592529297
2007	29.6719398498535
2008	29.7996292114258
2009	29.8219203948975
2010	29.9682292938232
2011	30.0022201538086
2012	30.0363502502441
2013	30.0366497039795
2014	30.0571193695068
2015	30.0416603088379
2016	30.0917091369629
2017	30.0558700561523
2018	30.0552501678467
2019	30.0201396942139
2021	31.3305644989014
2022	32.643310546875
2023	32.532039642334