subtract 10%iles      0.00000   0.00119156    0.0293589    0.0615332
     0.100269     0.152416     0.229269     0.362134     0.680262
diff 10%iles    -0.246585   -0.0964293   -0.0402570  -0.00921798      0.00000
   0.00831676    0.0396607    0.0970014     0.249728
stardiff 10%iles   -0.0384423   -0.0123607  -0.00325235      0.00000
   0.00110571   0.00630612    0.0128990    0.0236805    0.0511318
stardiff contour -excluded 0.005   -0.0384423    0.0511318