Year	Percent
1990	1.98
1995	2.37
2000	0.86
2001	1.67
2002	1.64
2003	2.34
2004	2.03
2005	2.09
2006	2
2007	2.16
2008	2.1
2009	2.11
2010	2.38
2011	1.94
2012	2.21
2013	2.2
2014	2.18
2015	2.46
2016	2.17
2017	2.11