Year	Years
1980	4.566
1981	4.071
1982	4.402
1983	5.034
1984	-0.3383
1985	-1.753
1986	-2.313
1987	-3.16
1988	-1.766
1989	-1.304
1990	-0.7279
1991	-0.6202
1992	-0.3795
1993	1.066
1994	-0.8215
1995	0.7689
1996	0.7864
1997	0.8189
1998	0.3621
1999	0.8074
2000	0.8189
2001	1.556
2002	0.9972
2003	-0.01794