Year	%
2000	29.68962619025269
2001	28.929236794167007
2002	28.31608571962937
2003	27.700698598830233
2004	27.062140932418405
2005	26.354927325014703
2006	25.650553558295133
2007	24.923619758792732
2008	24.2442489810291
2009	23.575367387479403
2010	22.93418750627589
2011	22.510281828431957
2012	22.184184901127345
2013	21.99063863631471
2014	21.829232259614106
2015	21.79389641365032
2016	21.84784456075244
2017	21.73819385615531
2018	21.630043228075177
2019	21.585557250020635