Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Proportion of each type or subtype according to Ling classification n (%)
| Type | Proportion |
| Ling I | 410 (64.5) |
| Ling II | 208 (32.7) |
| Ling IIa | 93 (14.6) |
| Ling IIb | 63 (9.9) |
| Ling IIc | 52 (8.2) |
| Ling III | 18 (2.8) |
| Ling IIIl | 5 (0.8) |
| Ling IIIr | 2 (0.3) |
| Ling IIIlr | 11 (1.7) |
