subtract 10%iles      0.00000      0.00000    0.0218838    0.0507755
    0.0842437     0.126411     0.185129     0.280622     0.501627
stardiff 10%iles    -0.195129   -0.0841549   -0.0393089   -0.0118400
      0.00000   0.00399992    0.0309355    0.0762981     0.190105
stardiff contour -excluded 0.005    -0.195129     0.190105