subtract 10%iles  0.000255585   0.00632477    0.0112538    0.0160289
    0.0211821    0.0274472    0.0362525    0.0518990    0.0966110
diff 10%iles   -0.0407333   -0.0215693   -0.0123329  -0.00554657  0.000403881
   0.00630951    0.0129519    0.0219984    0.0411615
stardiff 10%iles   -0.0244448   -0.0141045  -0.00796161  -0.00310316
   0.00125273   0.00552867    0.0101732    0.0160345    0.0263535
stardiff contour -excluded 0.005   -0.0244448    0.0263535