Year	Percent
1998	2.96
1999	4.62
2000	5.33
2001	7.32
2002	5.21
2003	8.65
2004	5.04
2005	4.26
2006	5.3
2007	4.32
2008	2.8
2009	3.39
2010	3.22
2011	2.72
2012	2.73
2013	2.25
2014	2.12
2015	2.69
2016	2.8
2017	2.03
2018	2.83
2019	3.53
2020	3.51