| Row Score | 6 months | 2 years | 4 years | 8 years |
| No. of calcanei | No. of calcanei | No. of calcanei | No. of calcanei | |
| Excellent | 0 | 11 (27%) | 5 (16%) | 2 (15%) |
| Good | 12 (26%) | 13 (33%) | 17 (55%) | 7 (54%) |
| Fair | 16 (34%) | 9 (22%) | 7 (23%) | 3 (23%) |
| Poor | 19 (40%) | 7 (18%) | 2 (6%) | 1 (8%) |
| Total | 47 | 40 | 31 | 13 |