Year	Percent
1996	1.7
1997	2.55
1998	2.16
1999	2.4
2000	2.14
2001	3.26
2002	2.33
2003	2.63
2004	2.44
2007	1.9346
2009	1.5752
2010	1.0768
2011	0.9043
2012	0.933
2013	1.0863
2014	1.1072
2015	1.7136
2016	1.7016
2017	1.7105