| Attempt Number | Proportion of Subjects Achieving Highest SNIP Value n (% total) | Proportion of Subjects Achieving SNIP Repeatabilityn (% total) |
| 1 | 3 (4.3) | - |
| 2 | 5 (7.1) | - |
| 3 | 4 (5.7) | 4 (5.7) |
| 4 | 8 (11.4) | 2 (2.9) |
| 5 | 10 (14.3) | 10 (14.3) |
| 6 | 10 (14.3) | 11 (15.7) |
| 7 | 7 (10) | 13 (18.6) |
| 8 | 16 (22.9) | 18 (25.7) |
| 9 | 5 (7.1) | 9 (12.9) |
| 10 | 2 (2.9) | 3 (4.3) |