subtract 10%iles -0.000658989    0.0196991    0.0404034    0.0644636
    0.0942125     0.133347     0.188946     0.278707     0.475069
diff 10%iles    -0.197648   -0.0979648   -0.0521479   -0.0227795  0.000303745
    0.0232673    0.0521560    0.0968838     0.193715
stardiff 10%iles   -0.0491707   -0.0228651   -0.0109424  -0.00289256
   0.00388083    0.0105734    0.0182891    0.0292246    0.0518029
stardiff contour -excluded 0.005   -0.0491707    0.0518029