Year	Percent
1996	4.23
1997	5.16
1998	4.29
2006	4.96
2007	5.87
2009	4.8
2010	2.21
2011	1.62
2012	1.6
2013	1.2
2014	1.46
2015	1.47
2016	2.01
2017	1.67
2018	0.87
2019	1.58