Year	%
1997	11.3989637305699
1998	8.29015544041451
1999	8.29015544041451
2000	8.29015544041451
2001	8.29015544041451
2002	9.06735751295337
2003	9.84455958549223
2004	9.09090909090909
2005	9.09090909090909
2006	10.3626943005181
2007	11.139896373057
2008	11.139896373057
2009	11.139896373057
2010	9.06735751295337
2011	8.80829015544041
2012	8.80829015544041
2013	8.80829015544041
2014	10.0502512562814
2015	10.1010101010101
2016	10.1010101010101
2017	10.0502512562814
2018	12.5628140703518
2019	12.5628140703518
2020	12.0603015075377
2021	13.0653266331658
2022	14.070351758794
2023	14.070351758794