apr11 1981 -0.093 -0.124 -0.344 -0.487 -0.643 -0.646 -0.705 -0.496 -0.795 apr16 1981 0.093 0.010 0.046 -0.116 -0.234 -0.404 -0.388 -0.249 -0.591 apr21 1981 -0.170 -0.459 -0.787 -0.362 -0.001 -0.550 -0.624 -0.607 -0.656 apr26 1981 0.039 -0.084 -0.352 -0.535 -0.468 -0.253 -0.510 -0.702 -0.803