Year	Percent
1996	6.88928
1997	13.08145
1998	5.12218
1999	-1.14798
2000	10.03454
2001	7.00815
2002	6.75045
2003	8.09245
2004	6.9321
2005	10.0014
2006	10.92403
2007	8.24085
2008	-5.16551
2009	-14.55986
2010	2.49255
2011	7.92444
2012	4.68129
2013	2.29997
2014	3.1609
2015	1.60766
2016	2.03355
2017	4.87885