Year	%
2000	17.474146447615624
2001	16.98402257670284
2002	16.68097490021521
2003	16.41805914740138
2004	15.827005710388825
2005	15.583666791631996
2006	15.193307192182068
2007	14.964408376839208
2008	14.624492752719641
2009	14.488160177256006
2010	14.148452819472665
2011	13.898177350027312
2012	13.766112088569296
2013	13.479604448165935
2014	13.159205776226209
2015	13.231752654565762
2016	12.939058698391545
2017	12.76148968789956
2018	12.589027811628227
2019	12.3569550314295