Year	Years
1960	0.3157
1961	-1.038
1962	-0.7569
1963	0.7062
1964	1.041
1965	1.053
1966	1.21
1967	1.162
1968	1.885
1969	1.744
1970	1.943
1971	2.331
1972	1.968
1973	1.55
1974	1.183
1975	0.9616
1976	0.3266
1977	0.01091
1978	-0.5684
1979	-2.931
1980	-3.401
1981	-4.217
1982	-4.081
1983	-3.667
1984	-3.434
1985	-4.084
1986	-4.044
1987	-4.459
1988	-4.026
1989	-1.553
1990	-0.5497
1991	0.9152
1992	0.4514
1993	0.4018
1994	2.049
1995	2.4
1996	3.036
1997	3.923
1998	4.247
1999	4.375
2000	4.078
2001	3.96
2002	4.035
2003	3.748