subtract 10%iles      0.00000   0.00654602    0.0720501     0.151261
     0.251944     0.398167     0.636924      1.06422      2.00830
diff 10%iles    -0.429967    -0.179531   -0.0759740   -0.0180888      0.00000
    0.0145664    0.0734944     0.177788     0.426171
stardiff 10%iles   -0.0644628   -0.0239975  -0.00822354      0.00000
      0.00000   0.00792861    0.0188293    0.0364908    0.0767144
stardiff contour -excluded 0.005   -0.0644628    0.0767144