subtract 10%iles      0.00000      0.00000    0.0201747    0.0490968
    0.0837877     0.128806     0.194480     0.308456     0.592761
diff 10%iles    -0.226970   -0.0914540   -0.0397835   -0.0100410      0.00000
   0.00675058    0.0359471    0.0871115     0.222322
stardiff 10%iles   -0.0348191   -0.0123331  -0.00399132      0.00000
  2.31117e-05   0.00442513   0.00989012    0.0185362    0.0399303
stardiff contour -excluded 0.005   -0.0348191    0.0399303