Year	Years
1969	2.064
1970	1.413
1971	1.576
1972	3.453
1973	3.037
1974	2.608
1975	1.306
1976	1.258
1977	-0.2072
1978	-0.7581
1979	-0.2721
1980	0.1931
1981	-0.1648
1982	-0.5942
1983	-1.296
1984	-0.9342
1985	0.2768
1986	-0.04751
1987	0.9559
1988	1.284
1989	0.06601
1990	-0.345
1991	0.2075
1992	-0.3812
1993	0.4266
1994	-0.1388
1995	-0.5352
1996	-0.0768
1997	0.5543
1998	0.7409
1999	1.268
2000	1.432
2001	1.36
2002	1.545
2003	1.795