subtract 10%iles      0.00000  0.000942472    0.0397775    0.0883317
     0.151581     0.243504     0.388143     0.643770      1.24287
diff 10%iles    -0.329528    -0.140519   -0.0602868   -0.0142732      0.00000
    0.0106574    0.0545201     0.131510     0.318825
stardiff 10%iles   -0.0488605   -0.0169973  -0.00470915      0.00000
  0.000769951   0.00688190    0.0145988    0.0267825    0.0542781
stardiff contour -excluded 0.005   -0.0488605    0.0542781