subtract 10%iles      0.00000      0.00000    0.0191748    0.0470814
    0.0817161     0.129416     0.202408     0.328310     0.627272
diff 10%iles    -0.235822   -0.0930383   -0.0388684  -0.00884032      0.00000
   0.00783515    0.0374707    0.0909295     0.233427
stardiff 10%iles   -0.0341950   -0.0110377  -0.00263008      0.00000
   0.00131620   0.00607527    0.0120190    0.0216692    0.0447345
stardiff contour -excluded 0.005   -0.0341950    0.0447345