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| Age of operation | Boy + girl | Boy | Girl |
|---|---|---|---|
| 0–1 | 2 (0.2) | 1 (0.2) | 1 (0.2) |
| 1–2 | 109 (9.7) | 56 (11.0) | 53 (8.5) |
| 2–3 | 317 (28.1) | 138 (27.2) | 179 (28.9) |
| 3–4 | 239 (21.2) | 111 (21.9) | 128 (20.6) |
| 4–5 | 85 (7.5) | 40 (7.9) | 45 (7.3) |
| 5–6 | 58 (5.1) | 22 (4.3) | 36 (5.8) |
| 6–7 | 134 (11.9) | 53 (10.4) | 81 (13.1) |
| 7–8 | 114 (10.1) | 51 (10.0) | 63 (10.2) |
| 8–9 | 47 (4.2) | 24 (4.7) | 23 (3.7) |
| 9–10 | 23 (2.0) | 12 (2.4) | 11 (1.8) |
| Total | 1,128 | 508 | 620 |
Values are presented as number (%).
