Year	Years
1970	0.08343
1971	-0.1227
1972	-0.1567
1973	-0.01625
1974	0.1321
1975	0.0401
1976	0.02865
1977	1.35
1978	1.108
1979	1.205
1980	1.983
1981	3.229
1982	4.994
1983	5.359
1984	5.09
1985	5.925
1986	5.726
1987	4.204
1988	3.701
1989	2.002
1990	1.289
1991	-0.2552
1992	-2.518
1993	-3.528
1994	-4.195
1995	-4.951
1996	-4.771
1997	-3.032
1998	-2.316
1999	-1.197
2000	-0.864
2001	-0.08438
2002	0.9029
2003	1.726