Year	Percent
1996	0.84
2000	2.76
2001	2.06
2004	7.53
2007	1.26
2008	0.82
2009	0.58
2010	0.77
2011	0.58
2012	1.28
2013	0.44
2014	0.69
2015	0.39
2016	0.72
2017	0.14
2019	1.22