subtract 10%iles      0.00000   0.00224447    0.0336916    0.0696216
     0.112715     0.169198     0.251926     0.391951     0.716984
diff 10%iles    -0.266390    -0.109931   -0.0472112   -0.0108056      0.00000
   0.00950193    0.0445251     0.105276     0.261331
stardiff 10%iles   -0.0393229   -0.0140727  -0.00394935      0.00000
  0.000834420   0.00626519    0.0128798    0.0231163    0.0466641
stardiff contour -excluded 0.005   -0.0393229    0.0466641