Year	%
2000	6.74079584091921
2001	6.62264095282133
2002	6.53527231843787
2003	6.3822957419042
2004	6.40372014105318
2005	6.32438043146937
2006	6.31291969623776
2007	6.37014092008537
2008	6.46806595708413
2009	6.49210829853913
2010	6.62100932290439
2011	5.98951891112521
2012	6.08809213956086
2013	6.21524436352308
2014	6.3632679504441
2015	5.89043905883811
2016	5.9705184685924
2017	5.96964498975754
2018	6.01598589861461
2019	5.95570171261861
2020	5.25050236466573