subtract 10%iles      0.00000   0.00307000    0.0513153     0.106719
     0.178820     0.283566     0.448902     0.747052      1.48120
diff 10%iles    -0.361703    -0.154590   -0.0661190   -0.0153830      0.00000
    0.0121093    0.0606458     0.145758     0.350832
stardiff 10%iles   -0.0593078   -0.0213203  -0.00597390      0.00000
   0.00100565   0.00884550    0.0186806    0.0340678    0.0683641
stardiff contour -excluded 0.005   -0.0593078    0.0683641