Year	Percent
1961	5.06445
1962	3.10996
1963	-0.26412
1964	4.42103
1965	2.75243
1966	0.18838
1967	23.62919
1968	5.75073
1969	5.30196
1970	7.884
1971	3.44012
1972	7.97638
1973	6.52953
1974	10.65609
1975	5.99007
1976	19.67444
1977	5.88477
1978	3.40981
1979	12.85277
1980	14.24589
1981	8.80019
1982	12.48195
1983	12.76307
1984	13.55219
1985	11.18713
1986	0.17924
1987	-2.39231
1988	0.8139
1989	-1.81908
1990	1.6431
1991	3.56871
1992	-1.27767
1993	39.80023
1994	9.61874
1995	4.99279
1996	1.07276
1997	5.5889
1998	4.30829
1999	-1.11977
2000	5.21482
2001	1.46067
2002	1.84166
2003	0.19581
2004	1.98601
2005	0.74897
2006	3.35866
2007	0.95776
2008	6.61278
2009	1.64518
2010	1.90983
2011	2.67023
2012	2.6709
2013	2.04115
2014	2.09607
2015	0.17915
2016	0.03055
2017	2.76021