Year	%
2000	29.2162131675525
2001	28.675071344988254
2002	28.348591388983504
2003	28.237832549310248
2004	28.06173615587246
2005	27.962928606377552
2006	27.960037725149416
2007	27.718713083032366
2008	27.358670094661083
2009	27.067337150332804
2010	26.594991915638285
2011	26.0489010910958
2012	25.64578652642142
2013	25.328156344065164
2014	25.028877565180323
2015	24.737585835751855
2016	24.498435373730093
2017	24.39190117658725
2018	24.307407950102515
2019	24.15744417033936