subtract 10%iles      0.00000   0.00920975    0.0574732     0.110534
     0.175762     0.267079     0.416677     0.706274      1.41800
diff 10%iles    -0.346384    -0.138547   -0.0575819   -0.0132968      0.00000
    0.0117040    0.0569444     0.139985     0.353172
stardiff 10%iles   -0.0525029   -0.0179773  -0.00542080      0.00000
  0.000594050   0.00733154    0.0159954    0.0304534    0.0666187
stardiff contour -excluded 0.005   -0.0525029    0.0666186