Year	Years
1980	3.588
1981	2.766
1982	2.226
1983	0.1355
1984	0.9897
1985	1.358
1986	0.1784
1987	0.2395
1988	-0.44
1989	-1.268
1990	1.476
1991	1.851
1992	1.253
1993	1.567
1994	0.9465
1995	0.5905
1996	2.141
1997	1.48
1998	1.938
1999	1.399
2000	-1.219
2001	-1.088
2002	0.0151
2003	0.517