subtract 10%iles  0.000377655    0.0283175    0.0550919    0.0841830
     0.117910     0.159745     0.216059     0.301764     0.476086
diff 10%iles    -0.199701    -0.102364   -0.0563862   -0.0253029  0.000465393
    0.0262470    0.0572581     0.103096     0.199990
stardiff 10%iles   -0.0468468   -0.0231855   -0.0113484  -0.00301844
   0.00406751    0.0110382    0.0189209    0.0296302    0.0498867
stardiff contour -excluded 0.005   -0.0468468    0.0498867