| Value | Category |
|---|---|
| 000 | NIU (not in universe) |
| 100 | None |
| 110 | Adult literacy program |
| 200 | Elementary school |
| 201 | Elementary, grade 1 |
| 202 | Elementary, grade 2 |
| 203 | Elementary, grade 3 |
| 204 | Elementary, grade 4 |
| 205 | Elementary, grade 5 |
| 206 | Elementary, grade 6 (old system) |
| 207 | Unknown grade |
| 300 | Middle school |
| 301 | Middle school, grade 1 |
| 302 | Middle school, grade 2 |
| 303 | Middle school, grade 3 |
| 304 | Middle school, unknown grade |
| 310 | Middle school (old system) |
| 311 | Middle school (old system), grade 7 or 8 |
| 312 | Middle school (old system), grade 9 |
| 400 | High school |
| 401 | High school, grade 1 |
| 402 | High school, grade 2 |
| 403 | High school, grade 3 |
| 404 | High school, unknown grade |
| 410 | Pre-university (additional year) |
| 411 | Pre-university, no degree |
| 412 | Pre-university, degree |
| 420 | Preliminary theology |
| 500 | Vocational, credited system |
| 501 | Vocational, credited system, no degree |
| 502 | Vocational, credited system, degree |
| 510 | Training and mastership, credited system |
| 511 | Training and mastership, credited system, no degree |
| 512 | Training and mastership, credited system, degree |
| 520 | Vocational, 4-years system |
| 521 | Vocational, 4-years system, no degree |
| 522 | Vocational, 4-years system, degree |
| 530 | Vocational, 6-years system |
| 531 | Vocational, 6-years system, no degree |
| 532 | Vocational, 6-years system, degree |
| 540 | Other vocational or technical |
| 541 | Pre-vocational or pre-technical, short |
| 542 | Vocational or technical, theoretical track, short |
| 543 | Vocational or technical, practical track, short |
| 544 | Pre-vocational or pre-technical, long |
| 545 | Vocational or technical, long |
| 546 | Other vocational/technical or teacher training |
| 600 | College |
| 601 | College, no degree |
| 602 | College, degree |
| 610 | Master's program |
| 611 | Graduate program, no degree |
| 612 | Graduate program, degree |
| 620 | Medicine |
| 621 | Medicine, no degree |
| 622 | Medicine, degree |
| 630 | Community college |
| 631 | Community college, no degree |
| 632 | Community college, degree |
| 640 | Doctoral program |
| 641 | Doctoral program, no degree |
| 642 | Doctoral program, degree |
| 650 | Post doctoral |
| 651 | Post doctoral program, no degree |
| 652 | Post doctoral program, degree |
| 699 | College, unknown |
| 700 | Shiism theology |
| 701 | Shiism theology, 1st level |
| 702 | Shiism theology, 2nd level |
| 703 | Shiism theology, 3rd level |
| 710 | Seminary school theology |
| 711 | Seminary school theology, 1st level |
| 712 | Seminary school theology, 2nd level |
| 720 | Theology |
| 721 | Theology, Sunni |
| 722 | Theology, other sects |
| 723 | Theology, other religions |
| 724 | Theology, unknown religion |
| 999 | Unknown |
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