subtract 10%iles      0.00000   0.00437856    0.0617628     0.125510
     0.207976     0.329963     0.526339     0.887770      1.77925
diff 10%iles    -0.390678    -0.167769   -0.0721874   -0.0171084      0.00000
    0.0128584    0.0658212     0.158203     0.379811
stardiff 10%iles   -0.0559219   -0.0202766  -0.00605460      0.00000
  0.000506574   0.00765187    0.0166467    0.0307152    0.0620332
stardiff contour -excluded 0.005   -0.0559219    0.0620332