Year	% gross
1976	0.622820019721985
1977	0.595160007476807
1978	0.759959995746613
1979	0.785880029201508
1980	0.78904002904892
1981	0.844760000705719
1983	0.925419986248016
1984	1.07977998256683
1986	1.04627001285553