subtract 10%iles -0.000808716    0.0106483    0.0210695    0.0326200
    0.0467882    0.0655098    0.0925293     0.138274     0.249702
diff 10%iles    -0.102959   -0.0484600   -0.0257916   -0.0112822  0.000615120
    0.0124125    0.0265932    0.0486052     0.101738
stardiff 10%iles   -0.0360519   -0.0184795  -0.00965216  -0.00312779
   0.00256937   0.00814041    0.0142832    0.0223531    0.0379087
stardiff contour -excluded 0.005   -0.0360519    0.0379087