Year	%
2000	16.322259281127884
2001	15.868675835027192
2002	15.595078807334806
2003	15.332808854789157
2004	14.842240612600314
2005	14.562897386823288
2006	14.190629354265184
2007	13.954794208280402
2008	13.713019980139057
2009	13.503380143693288
2010	13.227272503283563
2011	12.962152654832462
2012	12.800736476437963
2013	12.58094179608776
2014	12.416614668862055
2015	12.41318110071112
2016	12.342094624290569
2017	12.133093057633559
2018	11.944953532232125
2019	11.832563290916081