Diameter T10    T25    T28
  11.5  217.1  138.2  128.4
  13.1  168.3  109.3  103.1
  14.4  136.6   89.1   82.7
  15.8  114.6   73.0   70.5
  17.3   96.4   61.3   59.7
  18.7   80.8   56.2   50.0
  20.2   70.4   46.3   41.4