Year	%
2000	29.81063556103754
2001	29.465749666939317
2002	29.228826896679006
2003	29.096305103055982
2004	28.919465039352346
2005	28.878312448603744
2006	28.718021209129436
2007	28.441808483700534
2008	28.07867324298198
2009	27.71216239795829
2010	27.282024759115494
2011	26.834268552658394
2012	26.481904284804507
2013	26.14196545062036
2014	25.8520215604305
2015	25.48111968280331
2016	25.206707523425642
2017	24.99770567084918
2018	24.825716398526648
2019	24.60431169460471