Year	Percent
1996	2.16
1997	3.19
1998	2.42
1999	2.25
2000	2.37
2001	2.27
2002	1.92
2003	1.88
2004	1.86
2007	2.1153
2009	1.8895
2010	1.1481
2011	1.0881
2012	1.1151
2013	1.4093
2014	1.3974
2015	1.9945
2016	1.9924
2017	2.0492