subtract 10%iles -0.000828505      0.00000    0.0142677    0.0366726
    0.0640616     0.100667     0.154684     0.247805     0.486352
diff 10%iles    -0.188910   -0.0734274   -0.0317662  -0.00805616      0.00000
   0.00560427    0.0292315    0.0709996     0.186285
stardiff 10%iles   -0.0270068  -0.00949285  -0.00304763      0.00000
  0.000308748   0.00420507   0.00901134    0.0164554    0.0344750
stardiff contour -excluded 0.005   -0.0270068    0.0344750