Year	Years
1980	3.434
1981	4.748
1982	5.752
1983	6.097
1984	6.427
1985	8.284
1986	8.018
1987	6.909
1988	6.382
1989	6.181
1990	6.018
1991	3.954
1992	1.369
1993	-0.5599
1994	-0.6491
1995	-3.268
1996	-3.113
1997	-3.315
1998	-3.322
1999	-2.739
2000	-1.643
2001	-1.111
2002	0.4822
2003	2.425