Year	%
2000	29.48017484008067
2001	28.999105065558716
2002	28.737866639794305
2003	28.498858911101696
2004	28.32451656798955
2005	27.69255970942745
2006	26.550820827796603
2007	25.929729550119923
2008	25.72003245161626
2009	25.398907242258538
2010	25.145514068468717
2011	24.73027860550937
2012	24.2968317731106
2013	23.803878823032868
2014	23.40224122153235
2015	22.965173354429517
2016	22.77721114863095
2017	22.130233523926613
2018	21.75705883290773
2019	21.45565304825188