Year	Percent
2002	6.26
2003	7.37
2004	7.49
2005	6.64
2006	6.75
2007	4.34
2008	3.38
2009	5.74
2010	6.7
2011	6.24
2012	5.27
2013	4.79
2014	3.68
2015	4.54
2016	4.04
2017	4
2018	4.03
2019	5.1
2020	3.62