subtract 10%iles      0.00000      0.00000    0.0183289    0.0423077
    0.0715268     0.109974     0.166687     0.266665     0.523423
stardiff 10%iles    -0.317200    -0.123161   -0.0512158   -0.0106492
      0.00000    0.0122627    0.0532796     0.125825     0.320687
stardiff contour -excluded 0.005    -0.317200     0.320687