Year	Percent
1996	3.58104
1997	5.25581
1998	3.51116
1999	5.19918
2000	3.84751
2001	2.78735
2002	3.70772
2003	2.78009
2004	4.28496
2005	3.82302
2006	5.31937
2007	6.34529
2008	3.1369
2009	-8.62692
2010	0.79724
2011	0.4405
2012	-2.87379
2013	-1.26615
2014	2.87796
2015	2.18204
2016	3.07288
2017	4.91414