Year	Percent
1961	6.84797
1962	2.28405
1963	2.55747
1964	4.65485
1965	4.95239
1966	1.98985
1967	1.61703
1968	1.84501
1969	9.6569
1970	5.73358
1971	2.22782
1972	7.09615
1973	6.37798
1974	2.69746
1975	1.35402
1976	0.04235
1977	-0.04051
1978	2.62463
1979	6.84849
1980	5.06171
1981	0.86366
1982	2.51139
1983	2.50829
1984	2.66408
1985	3.10577
1986	2.39303
1987	3.26579
1988	4.90447
1989	4.709
1990	0.23039
1991	-6.42689
1992	-3.86633
1993	-1.21363
1994	3.4922
1995	3.81018
1996	3.31935
1997	5.93631
1998	5.149
1999	4.20198
2000	5.41577
2001	2.34749
2002	1.43417
2003	1.75106
2004	3.62475
2005	2.42879
2006	3.65662
2007	4.73826
2008	0.25285
2009	-8.70669
2010	2.52223
2011	2.09644
2012	-1.8941
2013	-1.21422
2014	-1.04183
2015	-0.1942
2016	1.84224
2017	2.33629