Year	%
2000	28.40505051933718
2001	28.40929950354801
2002	28.436630403652952
2003	28.341439300134695
2004	28.16135548788235
2005	28.128836071414334
2006	27.771203233407963
2007	27.49403032708486
2008	27.184747587882555
2009	26.742501607448684
2010	26.473856863614607
2011	26.23996905891335
2012	26.03841083490826
2013	25.794689394326284
2014	25.588977667372845
2015	25.218867094865946
2016	24.927247824659283
2017	24.59424053472268
2018	24.342727972484706
2019	24.052327444292988