Year	Years
1960	2.664
1961	2.069
1962	1.948
1963	2.176
1964	2.454
1965	2.21
1966	1.342
1967	0.6354
1968	1.382
1969	1.443
1970	2.661
1971	1.692
1972	1.328
1973	1.777
1974	1.885
1975	2.025
1976	2.951
1977	3.289
1978	2.761
1979	2.273
1980	1.282
1981	2.067
1982	1.585
1983	0.1765
1984	-0.7497
1985	-1.329
1986	-1.635
1987	-1.917
1988	-1.523
1989	-2.362
1990	-1.624
1991	-0.725
1992	0.01523
1993	0.42
1994	-0.03922
1995	0.3605
1996	-0.3053
1997	-0.0102
1998	-0.516
1999	-0.1064
2000	-0.2168
2001	-0.7634
2002	-2.091
2003	-2.58
2004	-0.8316