subtract 10%iles  -0.00256824    0.0158086    0.0338869    0.0546741
    0.0802457     0.113561     0.160553     0.236313     0.399302
diff 10%iles    -0.185667   -0.0915818   -0.0484905   -0.0209022  0.000796795
    0.0225096    0.0500846    0.0931559     0.187091
stardiff 10%iles   -0.0439070   -0.0210976   -0.0102241  -0.00258701
   0.00396213    0.0104442    0.0178382    0.0281187    0.0488199
stardiff contour -excluded 0.005   -0.0439070    0.0488199