Year	%
2000	28.58327432495605
2001	28.18550611776785
2002	27.79847861384327
2003	27.579575557401668
2004	27.25606486303196
2005	26.990294109936652
2006	26.807940752936183
2007	26.542251983334953
2008	26.371790507920032
2009	26.076701288715135
2010	25.724523173785087
2011	25.38764625330508
2012	25.013820239465286
2013	24.671021483394682
2014	24.26834176321017
2015	24.001824632280535
2016	23.700703588018353
2017	23.363630814501814
2018	23.041490922516562
2019	22.752838158234876