subtract 10%iles -0.000191450    0.0185244    0.0355072    0.0540352
    0.0760903     0.104328     0.143576     0.205765     0.335531
diff 10%iles    -0.132707   -0.0665483   -0.0363111   -0.0160861  0.000699043
    0.0175056    0.0377417    0.0680175     0.134001
stardiff 10%iles   -0.0471261   -0.0232842   -0.0116327  -0.00327073
   0.00398973    0.0112270    0.0194960    0.0308289    0.0530299
stardiff contour -excluded 0.005   -0.0471261    0.0530299