Year	%
2000	24.219145125964722
2001	23.95503781683794
2002	23.869731470552544
2003	23.640978864853995
2004	23.110695879481664
2005	22.749497507405042
2006	22.21340874394651
2007	21.862997658235457
2008	21.710358321541094
2009	21.445009746876973
2010	21.335388770328507
2011	21.07627060009961
2012	20.77282217426012
2013	20.17501554092554
2014	19.85115725336429
2015	19.797345477568705
2016	19.712783292595653
2017	19.33220201548223
2018	19.114837217804457
2019	18.938252282851657