subtract 10%iles -0.000849247      0.00000    0.0212257    0.0542510
    0.0943667     0.147599     0.225737     0.358386     0.672735
diff 10%iles    -0.255558    -0.104067   -0.0444372  -0.00955772      0.00000
   0.00978684    0.0431864     0.101584     0.253277
stardiff 10%iles   -0.0374562   -0.0125466  -0.00320044      0.00000
   0.00121806   0.00651997    0.0130749    0.0234182    0.0479990
stardiff contour -excluded 0.005   -0.0374562    0.0479990