Year	Years
1960	-1.7
1961	-1.964
1962	-1.994
1963	0.03603
1964	0.4199
1965	0.6329
1966	1.673
1967	2.268
1968	0.7268
1969	0.8258
1970	0.5389
1971	0.4939
1972	0.9091
1973	0.8224
1974	0.8542
1975	0.7032
1976	0.8298
1977	0.6123
1978	2.022
1979	1.94
1980	1.946
1981	1.687
1982	0.9421
1983	-0.3798
1984	-0.7707
1985	-1.407
1986	-2.37
1987	-2.405
1988	-2.128
1989	-2.027
1990	-1.742
1991	-1.517
1992	-1.127
1993	-0.11
1994	0.2923
1995	0.7593
1996	1.36
1997	1.289
1998	1.322
1999	1.321
2000	1.269
2001	1.221
2002	1.335
2003	1.266