Year	Percent
2002	4.47
2003	3.47
2004	2.51
2005	3.48
2006	2.72
2007	2.96
2008	2.73
2009	2.96
2010	2.62
2011	2.25
2012	1.8
2013	1.76
2014	1.19
2015	1.82
2016	1.94
2017	1.78
2018	1.6
2019	1.82
2020	4.7