Year	Years
1969	-0.1919
1970	-2.755
1971	-2.997
1972	-2.773
1973	-3.028
1974	-1.637
1975	-1.764
1976	-1.072
1977	-1.208
1978	-0.8042
1979	-0.6812
1980	0.936
1981	0.3744
1982	0.5797
1983	-0.05659
1984	-0.9487
1985	-1.286
1986	-1.747
1987	-1.251
1988	-1.1
1989	-0.9755
1990	-1.464
1991	-1.319
1992	-1.221
1993	-0.4012
1994	-0.156
1995	0.7074
1996	0.7937
1997	1.09
1998	1.218
1999	1.349
2000	1.488
2001	2.345
2002	2.688
2003	2.725
2004	3.254