subtract 10%iles      0.00000      0.00000    0.0237824    0.0573211
    0.0980324     0.151991     0.231180     0.365133     0.681287
diff 10%iles    -0.272641    -0.111444   -0.0480664   -0.0115368      0.00000
   0.00878978    0.0442868     0.106571     0.267864
stardiff 10%iles   -0.0390014   -0.0135536  -0.00401224      0.00000
  0.000540257   0.00561082    0.0120040    0.0221373    0.0460811
stardiff contour -excluded 0.005   -0.0390014    0.0460811