Year	annual % growth
1961	-3.504027906115809
1962	7.427585742836712
1963	2.110457800194922
1964	-2.4728199486764595
1965	5.420332276777145
1966	11.669518101604595
1967	11.256131355093956
1968	3.365133821967035
1969	-0.2602494911764097
1970	-0.6704955468075298
1971	-0.6079127672682603
1972	32.7950131253844
1973	-1.5687682364003308
1974	2.502639633715333
1975	9.148177509262666
1976	31.35764767278846
1977	61.46617416577345
1978	24.58462180416339
1979	-19.99321808318264
1980	78.10001206407674
1981	-27.19607459491219
1982	14.708733044243672
1983	-17.366325407910182
1984	12.607316683343967
1985	32.85974698605412
1986	-27.815592839961297
1987	12.744642774822992
1988	-31.901333666882152
1989	21.652040849567555