Year	Percent
1996	2
1997	6.76
1998	3.55
2006	6.65
2007	6.01
2009	6.64
2010	1.08
2011	0.6
2012	1.15
2013	0.99
2014	0.85
2015	1.59
2016	1.37
2017	1.18
2018	0.7
2019	0.91