Year	%
2000	30.768612676747193
2001	30.25956838433213
2002	30.236201964610242
2003	29.911226166596535
2004	29.13089059617827
2005	28.978283906257776
2006	27.82611508355682
2007	27.19389653847272
2008	26.747896516616795
2009	26.142903337442412
2010	25.59189029182898
2011	24.746995864551586
2012	24.14714531686839
2013	23.640902567884467
2014	23.76759800578793
2015	23.249875943517896
2016	23.139564767386975
2017	22.523991456551997
2018	22.349472273537337
2019	21.842222073448866