Year	Percent
1980	0.02538
1981	-0.01162
1982	-0.04589
1983	0
1984	0.0528
1985	0
1986	0
1987	0.01412
1988	-0.01275
1989	-0.04756
1990	0
1993	0.03059
1994	0.0419
1995	-0.13002
1996	0.05229
1997	3.07476
1998	3.47246
1999	4.20342
2000	-5.28026
2001	-7.44286
2002	-5.42731
2003	-0.50881
2004	0.2779
2005	0.25651
2006	0.2762
2007	0.40893
2008	0.03488
2009	0.32537
2010	0.15304
2011	0.27437
2012	0.1154
2013	0.16995
2014	-0.19873
2015	0.11216
2016	0.15569
2017	0.09019