Year	Percent
1991	2.64649
1992	7.34481
1993	2.54629
1994	-4.66374
1995	5.1479
1996	12.69289
1997	-1.30499
1998	2.74029
1999	6.12139
2000	12.82619
2001	5.91366
2002	3.31612
2003	2.2532
2004	5.59965
2005	1.49745
2006	4.1253
2007	-0.13146
2008	3.52347
2009	0.68903
2010	2.6433
2011	0.61543
2012	0.80839
2013	2.11165
2014	5.0654
2015	4.63068
2016	1
2017	1.4