| Source Strength | Grade 0 | Grade 1 | Grade 2 | Grade 3 | Grade 4 | Total | Percentage |
| Group A (<100 Gy3) | 7 | 4 | 5 | 0 | 0 | 16 | 18% |
| Group B (<100 Gy3) | 1O | 4 | 2 | 0 | 0 | 16 | 12% |
| Group A (>100 Gy3) | 5 | 8 | 16 | 5 | 0 | 34 | 58% |
| Group B (>100 Gy3) | 7 | 11 | 12 | 6 | 0 | 36 | 55% |
| Total | 29 | 27 | 35 | 11 | 0 | 102 |
|
| Percentage | 28.4% | 26.49% | 34.3% | 10.7% | 0 |
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