Year	Percent
2000	3.92433
2001	3.71753
2002	3.68557
2003	3.74109
2004	3.75637
2005	3.70239
2006	4.13203
2007	3.61241
2008	3.96381
2009	3.90816
2010	3.81482
2011	3.7586
2012	3.65945
2013	3.73684
2014	3.34204
2015	2.91802
2016	3.11767
2017	3.53641
2018	3.45077
2019	3.39222
2020	3.32369
2021	3.45771