Year	Years
1980	2.23
1981	2.778
1982	2.756
1983	3.026
1984	2.637
1985	2.856
1986	1.435
1987	-0.786
1988	-0.08612
1989	-0.3086
1990	0.06886
1991	-0.281
1992	-0.6253
1993	-2.671
1994	-4.387
1995	-6.106
1996	-2.422
1997	0.2135
1998	-0.2646
1999	2.555
2000	0.157
2001	2.319
2002	2.636
2003	7.697