subtract 10%iles  -0.00182343    0.0103440    0.0222111    0.0358887
    0.0529442    0.0760918     0.111225     0.174459     0.339880
diff 10%iles    -0.141430   -0.0640154   -0.0332394   -0.0143585  0.000690460
    0.0157585    0.0346766    0.0655565     0.143990
stardiff 10%iles   -0.0377906   -0.0178059  -0.00868456  -0.00221517
   0.00339731   0.00898760    0.0154097    0.0244676    0.0442759
stardiff contour -excluded 0.005   -0.0377906    0.0442759