Year	%
2000	23.986185758367803
2001	23.603006706204994
2002	23.38979332337156
2003	23.194720654094034
2004	23.00196969797611
2005	22.939181385195862
2006	22.714208349134267
2007	22.348467130068546
2008	22.0405985780208
2009	21.823411218541896
2010	21.602676942106022
2011	21.24089448018501
2012	20.93135263501302
2013	20.736397939915975
2014	20.515074449713154
2015	20.338374486723122
2016	20.22914411682709
2017	20.08517674935876
2018	20.019109939400792
2019	19.903361102276225