Year	Percent
1980	-13.60488
1981	0.11967
1982	0.78057
1983	1.71604
1984	3.60232
1985	2.77474
1986	-1.04557
1987	-1.05849
1988	5.99813
1989	4.68094
1990	-4.31967
1991	13.41822
1992	18.28258
1993	-5.28819
1994	3.74033
1995	7.36113
1996	33.56602
1997	5.18623
1998	2.90202
1999	6.853
2000	4.01154
2001	0.89524
2002	2.25273
2003	4.66554
2004	6.58021
2005	6.56659
2006	15.75062
2007	8.08243
2008	6.97759
2009	1.12105
2010	0.6058
2011	2.71349
2012	5.02347
2013	11.45595
2014	4.54843
2015	0.20849
2016	0.75686
2017	1.46963