Year	%
2000	30.963602095333073
2001	30.996128270919723
2002	30.936250424568797
2003	30.76736968034985
2004	30.59158739954678
2005	30.665074253093035
2006	30.19935554985498
2007	29.855292899780157
2008	29.48470199489559
2009	28.970103365069686
2010	28.6208154863545
2011	28.364112466547418
2012	28.11263998882693
2013	27.730774332269764
2014	27.46101545877746
2015	26.93958042587765
2016	26.60473757761879
2017	26.200531689266036
2018	25.85959687570104
2019	25.499725607450163