subtract 10%iles      0.00000      0.00000    0.0170069    0.0401287
    0.0677934     0.104106     0.157295     0.250743     0.492454
diff 10%iles    -0.192497   -0.0743060   -0.0316846  -0.00762677      0.00000
   0.00615692    0.0302787    0.0731101     0.191305
stardiff 10%iles   -0.0288328  -0.00977685  -0.00275850      0.00000
  0.000819815   0.00498231    0.0100817    0.0180073    0.0378127
stardiff contour -excluded 0.005   -0.0288328    0.0378127