subtract 10%iles      0.00000   0.00186239    0.0416939    0.0835857
     0.132159     0.193974     0.279486     0.415610     0.712404
stardiff 10%iles    -0.251734    -0.112859   -0.0536292   -0.0170753
      0.00000   0.00530109    0.0425850     0.104744     0.249512
stardiff contour -excluded 0.005    -0.251734     0.249511