Year	%
2000	27.04697892661919
2001	26.587071440897947
2002	26.30623971358752
2003	26.16093621905972
2004	25.978473640556057
2005	25.833783466670543
2006	25.785255639383653
2007	25.41893101933072
2008	25.052019548325344
2009	24.729087992092413
2010	24.351299126531327
2011	23.895912075860878
2012	23.467078509469395
2013	23.166151840704277
2014	22.88914285584909
2015	22.67738426127797
2016	22.52073691428681
2017	22.39326078332928
2018	22.364131557160636
2019	22.26270289314276