| Value | Category |
|---|---|
| 00 | Never attended school |
| 10 | First through eighth grade |
| 11 | Ninth through twelve grade (no H.S. diploma) |
| 12 | High school graduate |
| 13 | Some college, less than college graduate |
| 14 | Associate's degree (occupational/vocational or academic) |
| 15 | Bachelor's degree |
| 16 | Master's degree |
| 17 | Professional/Doctorate degree |