subtract 10%iles -0.000699043   0.00793028    0.0158792    0.0248075
    0.0361037    0.0519590    0.0768089     0.122971     0.244225
diff 10%iles   -0.0975552   -0.0428877   -0.0221405  -0.00964355  0.000422716
    0.0104728    0.0228882    0.0433168    0.0971947
stardiff 10%iles   -0.0331650   -0.0163072  -0.00854989  -0.00292275
   0.00203742   0.00700089    0.0126535    0.0204186    0.0368950
stardiff contour -excluded 0.005   -0.0331650    0.0368950