subtract 10%iles      0.00000      0.00000    0.0189767    0.0429103
    0.0718155     0.110120     0.166371     0.264302     0.510764
diff 10%iles    -0.197505   -0.0766344   -0.0326371  -0.00798607      0.00000
   0.00631928    0.0312843    0.0756836     0.197598
stardiff 10%iles   -0.0294013   -0.0102294  -0.00313964      0.00000
  0.000570655   0.00492472    0.0102657    0.0185233    0.0387068
stardiff contour -excluded 0.005   -0.0294013    0.0387068