Year	%
2000	27.82777731309536
2001	27.42496545155894
2002	27.146642515509075
2003	26.999307106955353
2004	26.861005099964842
2005	26.652990120351856
2006	26.18657127900861
2007	25.91629709210227
2008	25.588396333452465
2009	25.0317612312646
2010	24.55658544249709
2011	24.242099895326973
2012	23.992398908935556
2013	23.63482613124965
2014	23.437318912562592
2015	23.091625070643563
2016	22.887903484844568
2017	22.579882373836043
2018	22.58234186024743
2019	22.39595309313835