Year	%
2000	17.39152078060186
2001	16.90193648342421
2002	16.614859045329336
2003	16.34174968107338
2004	15.895961555592983
2005	15.647912035736566
2006	15.39567736884486
2007	15.103020658402194
2008	14.700149594085481
2009	14.51051334007193
2010	14.135234131230785
2011	13.787341104426789
2012	13.669487992686097
2013	13.404336838962305
2014	13.201335754400032
2015	13.252496678179336
2016	12.839747109571862
2017	12.802007785015485
2018	12.573170983498182
2019	12.25165416771744