Year	Percent
1980	0.12852
1981	0.01211
1982	0.17312
1983	-0.02653
1984	0.06552
1985	0.04221
1986	0.11148
1987	0.01397
1988	1.77466
1989	0.73865
1990	-0.54266
1991	-0.09674
1992	0.14244
1993	0.03376
1994	0.21206
1995	0.08342
1996	0.20383
1997	0.1964
1998	0.08714
1999	0.06844
2000	0.81788
2001	0.02478
2002	1.06538
2003	0.21918
2004	0.03043
2005	-0.1066
2006	-0.01024
2007	-0.03241
2008	0.67288
2009	0.50741
2010	0.73964
2011	0.51098
2012	0.59806
2013	0.66207
2014	0.71342
2015	0.82381
2016	1.38559
2017	0.82253