Year	Years
1960	4.39
1961	3.149
1962	2.575
1963	3.12
1964	2.779
1965	1.76
1966	1.206
1967	-0.5926
1968	-1.072
1969	0.1161
1970	-0.6082
1971	0.6284
1972	0.8874
1973	0.5076
1974	1.374
1975	1.535
1976	2.78
1977	5.302
1978	4.854
1979	1.534
1980	-0.4345
1981	-0.4398
1982	-0.9685
1983	-1.674
1984	-3.348
1985	-2.186
1986	-2.544
1987	-3.587
1988	-2.531
1989	-0.5355
1990	0.7159
1991	0.3804
1992	0.6645
1993	1.23
1994	1.7
1995	-0.0737
1996	0.9923
1997	1.336
1998	0.6136
1999	0.4179
2000	0.1286
2001	-0.08335
2002	0.0627
2003	1.253
2004	1.32