Year	Years
1960	0.9193
1961	1.229
1962	1.019
1963	1.344
1964	1.591
1965	2.125
1966	2.277
1967	2.093
1968	2.168
1969	2.292
1970	2.374
1971	2.145
1972	2.866
1973	2.791
1974	2.813
1975	2.782
1976	2.426
1977	2.79
1978	2.462
1979	2.434
1980	2.582
1981	2.201
1982	1.127
1983	0.6109
1984	0.2559
1985	-0.05726
1986	-0.2477
1987	-0.8476
1988	-0.8818
1989	-1.216
1990	-1.49
1991	-1.247
1992	-0.9963
1993	-0.5399
1994	-0.1615
1995	0.2138
1996	0.5201
1997	0.71
1998	0.8332
1999	0.9524
2000	0.9819
2001	0.9253
2002	0.9338
2003	0.8138