Year	Years
1980	-0.4335
1981	0.7937
1982	1.204
1983	0.01693
1984	0.4428
1985	0.3088
1986	0.1198
1987	-0.9536
1988	-1.848
1989	-1.218
1990	-0.6249
1991	-0.8352
1992	-2.951
1993	-2.271
1994	-2.69
1995	-2.29
1996	-2.889
1997	-2.107
1998	-2.036
1999	-0.9658
2000	-0.6186
2001	-0.2164
2002	1.552
2003	1.486