Year	%
2000	43.11359542123719
2001	42.78691433643354
2002	42.542310989795546
2003	42.291702237208064
2004	41.993257595286124
2005	41.61341352506556
2006	41.21742319370503
2007	40.77896466575376
2008	40.32117392432188
2009	39.837937364594545
2010	39.39437469906487
2011	39.036757556443284
2012	38.71294976501397
2013	38.480038609266316
2014	38.268215146996546
2015	38.1179155886695
2016	38.04792005614032
2017	37.997977728856576
2018	37.904934006235955
2019	37.88187075152805