Year	annual % growth
1971	-1.6804061735077056
1972	6.24904664182489
1973	-4.424874777910432
1974	-35.34234463451273
1975	73.15464746342067
1976	3.5891001189961997
1977	35.29189402544381
1978	3.6658185137702617
1979	-5.8808942044983326
1980	4.152009271994729
1981	14.353665450471539
1982	2.833086501240473
1983	-12.2198520945351
1984	12.988308370755774
1985	9.521279591704015
1986	-1.3041213452780624
1987	8.219725597565983
1988	3.4474057401944833
1989	-2.6829483304524047
1990	1.32660051799391