subtract 10%iles      0.00000      0.00000    0.0233538    0.0509927
    0.0842471     0.126881     0.186973     0.293731     0.561923
diff 10%iles    -0.211713   -0.0818210   -0.0342803  -0.00793266      0.00000
   0.00729465    0.0340228    0.0822394     0.213853
stardiff 10%iles   -0.0311914   -0.0104790  -0.00288206      0.00000
  0.000966005   0.00552738    0.0112185    0.0203198    0.0428303
stardiff contour -excluded 0.005   -0.0311914    0.0428303