Year	Years
1970	3.689
1971	3.696
1972	2.95
1973	1.467
1974	1.233
1975	1.911
1976	2.386
1977	0.9745
1978	-0.1532
1979	-1.066
1980	-3.067
1981	-0.648
1982	0.09334
1983	-0.00248
1984	-0.1365
1985	-1.894
1986	-1.243
1987	-1.293
1988	-0.7564
1989	-0.2555
1990	2.419
1991	0.1277
1992	-3.238
1993	-1.546
1994	-0.4931
1995	0.04115
1996	0.4994
1997	0.802
1998	-2.023
1999	-1.613
2000	1.736
2001	-1.096
2002	1.896
2003	0.7457