subtract 10%iles -0.000233650   0.00532532   0.00982952    0.0142298
    0.0190344    0.0249839    0.0336595    0.0497465    0.0973144
diff 10%iles   -0.0396385   -0.0207710   -0.0118346  -0.00532961  0.000383854
   0.00610638    0.0126352    0.0217161    0.0413742
stardiff 10%iles   -0.0226653   -0.0129747  -0.00730833  -0.00285241
   0.00116530   0.00517203   0.00960907    0.0153325    0.0257251
stardiff contour -excluded 0.005   -0.0226653    0.0257251