Year	%
2000	18.501025219800194
2001	18.25939493374738
2002	18.260476876044752
2003	18.0977082052347
2004	17.710129702601915
2005	17.40935010902492
2006	17.043093869319264
2007	16.75374162925686
2008	16.509893994111696
2009	16.20664585266601
2010	16.073087283141035
2011	15.889001880901905
2012	15.68807211351573
2013	15.392045472059927
2014	15.248372821990156
2015	15.272911881620614
2016	15.197631663024493
2017	14.983616722586365
2018	14.881268970644461
2019	14.78445341062314