Year	Percent
1961	-1.015
1962	5.33234
1963	2.23663
1964	6.83607
1965	7.16198
1966	1.40887
1967	4.09377
1968	5.31667
1969	5.20414
1970	4.39339
1971	3.08386
1972	2.49224
1973	4.57545
1974	2.63127
1975	-0.88542
1976	3.63954
1977	1.91264
1978	2.06633
1979	1.31241
1980	0.54313
1981	-1.46195
1982	-1.69259
1983	1.68362
1984	2.6534
1985	2.10293
1986	2.21813
1987	1.28652
1988	2.77504
1989	3.79557
1990	3.46828
1991	1.63505
1992	0.94002
1993	0.55425
1994	2.34217
1995	2.60797
1996	3.08997
1997	3.76435
1998	3.88285
1999	4.3549
2000	3.49635
2001	1.35629
2002	-0.53329
2003	-0.18812
2004	1.67679
2005	1.92193
2006	3.35251
2007	3.47315
2008	1.30392
2009	-4.26122
2010	0.88388
2011	1.19054
2012	-1.4225
2013	-0.48417
2014	1.05541
2015	1.80852
2016	1.66745
2017	2.54479