| 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 |