subtract 10%iles  -0.00505638    0.0157347    0.0360746    0.0593901
    0.0878153     0.124674     0.176697     0.259811     0.436558
diff 10%iles    -0.196441   -0.0982175   -0.0526800   -0.0230603  0.000574112
    0.0241952    0.0537796    0.0994325     0.198795
stardiff 10%iles   -0.0460484   -0.0222942   -0.0108752  -0.00299557
   0.00367151    0.0102706    0.0178641    0.0284850    0.0498751
stardiff contour -excluded 0.005   -0.0460484    0.0498751