Year	Years
1980	4.298
1981	1.449
1982	0.8121
1983	0.1955
1984	-0.4565
1985	-0.6806
1986	-2.712
1987	-3.561
1988	-4.098
1989	-6.08
1990	-5.016
1991	-2.329
1992	-2.515
1993	-2.646
1994	-2.48
1995	-2.083
1996	-1.295
1997	-1.125
1998	-0.9591
1999	-1.229
2000	-1.142
2001	-1.162
2002	-0.6574
2003	-0.1757