Year	Years
1980	2.372
1981	2.545
1982	3.318
1983	4.254
1984	1.747
1985	1.811
1986	2.065
1987	1.194
1988	-0.102
1989	-0.04968
1990	1.547
1991	2.382
1992	2.208
1993	0.1541
1994	-0.1807
1995	0.7042
1996	0.2514
1997	2.01
1998	2.491
1999	1.583
2000	1.902
2001	-0.6638
2002	-1.826
2003	-0.907