Year	Years
1969	-1.17
1970	-1.143
1971	0.1156
1972	0.4178
1973	0.4004
1974	0.515
1975	0.7517
1976	0.9351
1977	0.7217
1978	0.1103
1979	0.3632
1980	0.7987
1981	1.723
1982	1.21
1983	1.04
1984	0.5616
1985	1.253
1986	1.589
1987	1.75
1988	2.344
1989	2.029
1990	1.032
1991	0.8827
1992	0.6275
1993	0.8075
1994	1.43
1995	0.4905
1996	0.09892
1997	-0.2482
1998	-0.568
1999	0.3791
2000	1.186
2001	0.8691
2002	1.431
2003	2.585
2004	2.325