subtract 10%iles  -0.00151062    0.0105867    0.0217719    0.0340700
    0.0486259    0.0674086    0.0943232     0.139787     0.249164
diff 10%iles    -0.128261   -0.0596466   -0.0317240   -0.0139675  0.000541687
    0.0150099    0.0326910    0.0604777     0.128880
stardiff 10%iles   -0.0349007   -0.0174605  -0.00873092  -0.00234916
   0.00323093   0.00874979    0.0149459    0.0232455    0.0393323
stardiff contour -excluded 0.005   -0.0349007    0.0393323