Year	Percent
1990	0.36411
1991	0.54331
1992	-0.44447
1993	-1.56359
1994	0.09031
1995	0.2687
1996	0.18719
1997	0.76053
1998	0.93868
1999	0.62806
2000	0.25607
2001	0.51305
2002	-0.664
2003	0.23986
2004	0.86347
2005	0.27042
2006	0.86242
2007	5.82497
2008	6.75714
2009	1.84838
2010	3.64033
2011	0.37753
2012	3.06423
2013	1.08041
2014	-0.18861
2015	1.34894
2016	1.36249
2017	0.21575