Year	%
2000	11.355376303694
2001	11.1686002669083
2002	11.267680928056
2003	9.23121459529381
2004	8.60463383159576
2005	7.9406117113065
2006	7.35180576859241
2007	6.36352811399913
2008	6.11779726520958
2009	6.01684609288797
2010	5.38646206031827
2011	5.40853974114551
2012	5.4577438100588
2013	5.77942593886547
2014	5.61206142828219
2015	5.86889170376008
2016	6.17320200543726
2017	5.59595663747085
2018	5.70677965022222
2019	5.17479442986646
2020	5.08927514189757