Year	Percent
1960	-6.44258
1961	-4.78368
1962	-0.62964
1963	-1.74313
1964	-2.49966
1965	0.00007
1966	-5.33204
1967	-3.40152
1968	-3.15379
1969	-4.57995
1970	-3.58634
1971	-5.04785
1972	-5.62433
1973	-3.73111
1974	-9.79356
1975	-12.75452
1976	-15.00861
1977	-22.8897
1978	-16.66723
1979	-17.15456
1980	-17.50206
1981	-17.62843
1982	-11.19725
1983	-13.6501
1984	-11.77471
1985	-12.83264
1986	-11.17135
1987	-13.49588
1988	-9.36206
1989	-4.87867
1990	0.38833
1991	-7.66873
1992	-11.37502
1993	-13.03863
1994	-12.33054
1995	-6.89715
1996	-6.26222
1997	-1.3815
1998	-0.3665
1999	0.32512
2000	6.80753
2001	6.14307
2002	7.53014
2003	4.90196
2004	0.24248
2005	-1.23681
2006	0.78127
2007	0.81041