Year	%
2000	24.786927033602346
2001	24.431337552923353
2002	24.262879948233692
2003	24.13217841275622
2004	23.99144053338893
2005	23.77985799083826
2006	23.413141916329746
2007	23.11310684517433
2008	22.82128243985502
2009	22.41290182806458
2010	22.00499045490149
2011	21.68958852998157
2012	21.435802866608945
2013	21.18477221987507
2014	21.053435056673134
2015	20.768487558643045
2016	20.6278771747879
2017	20.386365872049527
2018	20.377031917051458
2019	20.287713905527205