Year	%
2000	24.207727655387792
2001	23.988725458193567
2002	23.82597547391654
2003	23.733188842075663
2004	23.623057383255865
2005	23.412098088249262
2006	23.301230239698768
2007	23.03987852843247
2008	22.84019039583866
2009	22.70903526117152
2010	22.50759514841679
2011	22.332123424627408
2012	22.103828498802716
2013	21.94063127816347
2014	21.667166586623132
2015	21.43781120712462
2016	21.305582651585375
2017	21.064213326177605
2018	20.989915973136675
2019	20.899655491784664