subtract 10%iles  -0.00198078   0.00855923    0.0187132    0.0307732
    0.0466242    0.0691605     0.104583     0.170210     0.336787
diff 10%iles    -0.130754   -0.0571976   -0.0287971   -0.0122857  0.000560760
    0.0133886    0.0298629    0.0580139     0.130785
stardiff 10%iles   -0.0392960   -0.0183196  -0.00922548  -0.00278990
   0.00279596   0.00836764    0.0147846    0.0239541    0.0447340
stardiff contour -excluded 0.005   -0.0392960    0.0447340