Year	%
2000	34.48677387354808
2001	33.52776618359993
2002	33.36550106799009
2003	33.764494697761556
2004	32.836147556916195
2005	32.99063287223886
2006	33.14986682502118
2007	34.38233728712629
2008	35.23188576467567
2009	35.26483930913861
2010	34.86387635366983
2011	34.68139564163633
2012	34.52368401434428
2013	34.397800348639194
2014	34.28290530348851
2015	34.161146452103274
2016	33.89940063024063
2017	33.69310406695777
2018	33.69660486626686
2019	33.472127955806066