Year	% (cumulative)
1999	39.7728118896484
2007	34.3974800109863
2008	34.5229110717773
2009	34.5324592590332
2010	34.2644500732422
2011	34.2679901123047
2012	34.3075408935547
2013	34.2920303344727
2014	34.3459014892578
2015	34.4012107849121
2016	34.4523696899414
2017	34.4694595336914
2018	34.5250205993652
2019	34.529411315918
2021	35.2161407470703
2022	33.6715469360352
2023	33.9034004211426