Here are the relative percentages of different categories of vowels in the database, and their mean duration (as defined by the segmental transcription).
| Category | Count | Percent | Mean (ms) |
| All | 8104 | 91.9 | |
| Schwa | 2527 | 31.2 | 58.9 |
| Sonorant | 627 | 7.74 | 102.9 |
| Lax | 2170 | 26.8 | 91.8 |
| Tense | 2318 | 28.6 | 112.3 |
| Diphthong | 462 | 5.70 | 155.4 |