Year	%
2000	26.44724886385351
2001	26.091331715694782
2002	25.791356688427456
2003	25.624194902067114
2004	25.375218998432707
2005	25.131983515816852
2006	24.95326283953735
2007	24.698585965117516
2008	24.519212289250873
2009	24.2733463782036
2010	23.94844058952851
2011	23.629403546924078
2012	23.282859959804
2013	23.000723460574275
2014	22.701001996194446
2015	22.478743635223232
2016	22.23970251209777
2017	21.914878407253354
2018	21.615023353907034
2019	21.364770040868297