Year	%
2000	13.728705116760532
2001	13.472874124135666
2002	13.352231243835268
2003	13.142544614447104
2004	12.721711515710592
2005	12.549194873767771
2006	12.050967913586307
2007	11.732519846921267
2008	11.583947542436565
2009	11.310244089622799
2010	11.092599620896076
2011	10.838068279923172
2012	10.644648468043567
2013	10.425725287342736
2014	10.4333959770496
2015	10.277333626956
2016	10.285790042383962
2017	10.028104396212601
2018	9.950628245692974
2019	9.777707311698407