subtract 10%iles  -0.00841141      0.00000    0.0119789    0.0423279
    0.0804996     0.134842     0.218541     0.365044     0.711632
diff 10%iles    -0.282167    -0.113587   -0.0473878   -0.0112748      0.00000
   0.00817847    0.0430436     0.107317     0.274156
stardiff 10%iles   -0.0411756   -0.0145925  -0.00442071      0.00000
  0.000329681   0.00562468    0.0124315    0.0232933    0.0484258
stardiff contour -excluded 0.005   -0.0411756    0.0484257