subtract 10%iles      0.00000      0.00000    0.0187049    0.0443302
    0.0753937     0.118114     0.183626     0.299060     0.585701
diff 10%iles    -0.224741   -0.0884190   -0.0371991  -0.00885725      0.00000
   0.00677752    0.0345528    0.0848970     0.221073
stardiff 10%iles   -0.0314964   -0.0105872  -0.00292346      0.00000
  0.000792630   0.00513495    0.0105512    0.0191468    0.0399439
stardiff contour -excluded 0.005   -0.0314964    0.0399439