subtract 10%iles      0.00000    0.0146136     0.101765     0.196380
     0.313513     0.481722     0.745520      1.20916      2.24712
diff 10%iles    -0.466988    -0.197174   -0.0847354   -0.0201602      0.00000
    0.0156400    0.0800853     0.190790     0.456967
stardiff 10%iles   -0.0695164   -0.0264950  -0.00935236      0.00000
      0.00000   0.00831223    0.0198702    0.0379348    0.0792323
stardiff contour -excluded 0.005   -0.0695164    0.0792322