| 1987–1992* | 1993–1998* | 1999–2005* | 1987–2005* | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Birth order | One TBI | 2–3 TBIs | 4 TBIs or more | One TBI | 2–3 TBIs | 4 TBIs or more | One TBI | 2–3 TBIs | 4 TBIs or more | One TBI | 2–3 TBIs | 4 TBIs or more |
First | 72 (93.5%) | 5 (6.5%) | 0 | 155 (88.6%) | 9 (5.2%) | 11 (6.2%) | 298 (82.6%) | 40 (11.1%) | 23 (6.3%) | 525 (86.6%) | 54 (8.8%) | 34 (5.5%) |
Second | 94 (87%) | 5 (4.6%) | 9 (8.4%) | 155 (94.5%) | 9 (5.6%) | 0 | 250 (85.0%) | 30 (10.3%) | 14 (4.7%) | 499 (88.2%) | 44 (7.8%) | 23 (4.1%) |
Third | 43 (93.4%) | 3 (6.6%) | 0 | 70 (89.7%) | 5 (6.5%) | 3 (3.8%) | 126 (81.8%) | 17 (11.1%) | 11 (7.1%) | 239 (86.0%) | 25 (9.0%) | 14 (5.0%) |
Fourth or higher | 29 (87.8%) | 3 (9.1%) | 1 (3.1%) | 39 (82.9%) | 8 (17.1%) | 0 | 61 (79.3%) | 10 (12.9%) | 6 (7.8%) | 129 (82.2%) | 21 (13.4%) | 7 (4.5%) |