subtract 10%iles -0.000588279      0.00000    0.0187211    0.0472567
    0.0816369     0.126422     0.191514     0.304192     0.586560
diff 10%iles    -0.225283   -0.0902029   -0.0389903  -0.00943518      0.00000
   0.00731659    0.0364113    0.0872180     0.222033
stardiff 10%iles   -0.0344523   -0.0118713  -0.00352821      0.00000
  0.000520444   0.00506324    0.0107333    0.0197139    0.0416867
stardiff contour -excluded 0.005   -0.0344523    0.0416867