Year	Percent
1996	9.99651
1997	4.82606
1998	3.46868
1999	-2.08842
2000	6.75716
2001	3.10826
2002	5.24647
2003	5.55791
2004	4.10626
2005	4.09335
2006	4.83246
2007	5.24482
2008	2.0877
2009	-7.27024
2010	-1.16836
2011	2.86777
2012	-1.94544
2013	-0.37094
2014	0.31161
2015	3.19428
2016	3.88843
2017	3.99021