subtract 10%iles  0.000747681   0.00690508    0.0122347    0.0177879
    0.0246096    0.0347195    0.0525284    0.0892563     0.190250
diff 10%iles   -0.0520086   -0.0244579   -0.0135155  -0.00594139  0.000560760
   0.00698519    0.0143414    0.0250311    0.0519371
stardiff 10%iles   -0.0294327   -0.0156090  -0.00857162  -0.00320427
   0.00152533   0.00614688    0.0112205    0.0179588    0.0321773
stardiff contour -excluded 0.005   -0.0294327    0.0321772