{
  "matrix":  [
    [18, 13, 10,  9, 10, 13, 18],
    [13,  8,  5,  4,  5,  8, 13],
    [10,  5,  2,  1,  2,  5, 10],
    [ 9,  4,  1, 12,  1,  4,  9],
    [10,  5,  2,  1,  2,  5, 10],
    [13,  8,  5,  4,  5,  8, 13],
    [18, 13, 10,  9, 10, 13, 18],
    [18, 13, 10,  9, 10, 13, 18]
  ],
  "thresholds": [0, 4.5, 9, 13.5, 18]
}