subtract 10%iles -0.000679016   0.00711870    0.0141826    0.0218763
    0.0311680    0.0435758    0.0621395    0.0953407     0.179601
diff 10%iles   -0.0839233   -0.0384779   -0.0204999  -0.00916004  0.000183105
   0.00951576    0.0207901    0.0385809    0.0835629
stardiff 10%iles   -0.0286961   -0.0153227  -0.00829597  -0.00296094
   0.00179764   0.00655731    0.0118630    0.0188315    0.0319359
stardiff contour -excluded 0.005   -0.0286961    0.0319359