Year	%
2001	15.14805630068315
2002	17.222981755266893
2003	16.892675388368602
2004	18.149058109559057
2005	18.869507756685724
2006	17.617572656611785
2007	19.429464292191764
2008	17.530187012738956
2009	19.03556207142988
2010	19.155018959104503
2011	17.023971488975512
2012	18.40068321391709
2013	21.042458807427444
2014	19.467645152323634
2015	18.60684681165294
2016	18.420278799793575
2017	19.253811751906458
2018	18.703254394611957
2019	18.855371391926063
2020	18.664986665697565
2021	19.68823850966662
2022	17.304066881908923
2023	15.472605848930435