subtract 10%iles      0.00000   0.00202620    0.0379200    0.0811815
     0.134543     0.209010     0.322973     0.511634     0.920969
diff 10%iles    -0.335299    -0.137786   -0.0573602   -0.0131950      0.00000
    0.0102643    0.0533102     0.132091     0.330881
stardiff 10%iles   -0.0498254   -0.0172483  -0.00491236      0.00000
  0.000666030   0.00711325    0.0157240    0.0295244    0.0602186
stardiff contour -excluded 0.005   -0.0498254    0.0602186