Year	%
2000	28.987868684875703
2001	28.826228444777744
2002	28.590606280790418
2003	28.31138817334228
2004	27.361997315653976
2005	27.43364989279905
2006	27.68292458474821
2007	27.871056915281162
2008	28.021657908126027
2009	27.94622670985071
2010	28.04905119012641
2011	27.852462851297325
2012	27.51992004791682
2013	26.573006199271205
2014	25.86062826766787
2015	26.056448150382995
2016	25.923940359828052
2017	25.580065210879518
2018	25.339537793515262
2019	25.17883537929601