Year	%
2000	16.25240141029023
2001	15.935099731234846
2002	15.70790808481876
2003	15.564275275182204
2004	15.44474321480429
2005	15.384067173912895
2006	15.331782939966942
2007	15.34709491256224
2008	15.309688386092047
2009	15.325528744465354
2010	15.344947028067665
2011	15.41535078679509
2012	15.482387066511578
2013	15.522085710260708
2014	15.615889093516076
2015	15.668198700480238
2016	15.789718338390935
2017	15.859002060970344
2018	15.959012336932052
2019	16.07195699917626