Year	Percent
1966	7.00814
1967	4.02241
1968	4.76026
1969	11.00131
1970	11.31865
1971	7.51288
1972	7.76409
1973	6.56498
1974	12.62827
1975	7.11222
1976	6.54188
1977	5.86722
1978	-15.5109
1979	35.05755
1980	12.59887
1981	13.74435
1982	9.84347
1983	7.76907
1984	8.83967
1985	5.65058
1986	9.4229
1987	1.70288
1988	2.55924
1989	1.71843
1990	-4.6356
1991	3.63041
1992	2.84172
1993	2.71528
1994	2.89169
1995	1.33153
1996	1.42228
1997	2.05846
1998	0.20684
1999	0.09899
2000	-0.61626