subtract 10%iles  0.000174761   0.00685310    0.0124278    0.0179753
    0.0241318    0.0318346    0.0431223    0.0640755     0.122569
diff 10%iles   -0.0480638   -0.0247345   -0.0140553  -0.00633621  0.000395060
   0.00708055    0.0146616    0.0252123    0.0487576
stardiff 10%iles   -0.0257797   -0.0147994  -0.00831265  -0.00318728
   0.00140924   0.00591995    0.0108151    0.0170015    0.0280035
stardiff contour -excluded 0.005   -0.0257797    0.0280035