subtract 10%iles      0.00000      0.00000    0.0206459    0.0444398
    0.0727177     0.110404     0.165836     0.262399     0.505754
diff 10%iles    -0.195131   -0.0759120   -0.0323546  -0.00770330      0.00000
   0.00658798    0.0314164    0.0752172     0.194997
stardiff 10%iles   -0.0292208   -0.0101080  -0.00286622      0.00000
  0.000811165   0.00511236    0.0103807    0.0185019    0.0381781
stardiff contour -excluded 0.005   -0.0292208    0.0381781