Year	Percent
1978	-0.09349
1979	0.12872
1980	0.04124
1981	0.01259
1982	0.01495
1983	0.01072
1985	0.02564
1986	0.04002
1987	0.68725
1988	0.93345
1989	0.87503
1990	0.00344
1991	0.55953
1992	0.73197
1993	0.74697
1994	0.04763
1995	-0.16973
1996	0.07869
1997	0.06123
1998	-0.01739
1999	-0.13991
2005	0
2006	0
2007	0
2008	0
2009	0
2010	0
2011	0
2012	0
2013	0
2014	0
2015	0
2017	0