subtract 10%iles  1.62125e-05   0.00591421    0.0109196    0.0160608
    0.0221143    0.0303421    0.0433531    0.0682192     0.137224
diff 10%iles   -0.0518723   -0.0245316   -0.0134721  -0.00600410  0.000375509
   0.00674510    0.0142119    0.0253415    0.0532131
stardiff 10%iles   -0.0245761   -0.0134050  -0.00735294  -0.00272517
   0.00140626   0.00552075    0.0101257    0.0162448    0.0282078
stardiff contour -excluded 0.005   -0.0245761    0.0282078