subtract 10%iles  -0.00126457    0.0107241    0.0211411    0.0319591
    0.0442884    0.0598578    0.0822830     0.122002     0.225143
diff 10%iles   -0.0791404   -0.0406170   -0.0228033   -0.0102551  0.000570297
    0.0113893    0.0239358    0.0417852    0.0805001
stardiff 10%iles   -0.0379415   -0.0204538   -0.0109167  -0.00372522
   0.00265047   0.00900071    0.0160974    0.0253828    0.0421290
stardiff contour -excluded 0.005   -0.0379415    0.0421290