Year	Percent
2000	6.10061
2001	6.06817
2002	6.03574
2003	6.00331
2004	5.97087
2005	5.93844
2006	5.90601
2007	5.87357
2008	5.84114
2009	5.73397
2010	5.62762
2011	5.52212
2012	5.41745
2013	5.31361
2014	5.21061
2015	5.10844
2016	5.00711
2017	4.90661
2018	4.80694
2019	4.70812
2020	4.61012
2021	4.51296
2022	4.51296