subtract 10%iles      0.00000   0.00229513    0.0361218    0.0747147
     0.119664     0.181115     0.275255     0.444046     0.854952
diff 10%iles    -0.277179    -0.109389   -0.0456562   -0.0103152      0.00000
   0.00975603    0.0454283     0.110379     0.281206
stardiff 10%iles   -0.0410451   -0.0136334  -0.00367646      0.00000
   0.00109377   0.00679032    0.0139374    0.0253823    0.0537905
stardiff contour -excluded 0.005   -0.0410451    0.0537905