Year	Percent
1980	-0.00459
1981	0.00608
1982	0.01716
1983	0.00701
1984	0.02392
1985	0.02726
1986	-0.06872
1987	-0.03053
1988	0.19189
1989	0.00889
1990	-0.11371
1991	0.02025
1992	0.02802
1993	0.0553
1994	0.97294
1995	0.09502
1996	0.17481
1997	0.29317
1998	0.16822
1999	0.37552
2000	0.40605
2001	0.20685
2002	0.40169
2003	0.79709
2004	1.49366
2005	2.07638
2006	4.90363
2007	5.64824
2008	5.01476
2009	1.07392
2010	0.69534
2011	0.6211
2012	0.67701
2013	2.26305
2014	2.91114
2015	4.6607
2016	3.63089
2017	3.64778