| Value |
Category |
| 00 |
NIU (not in universe) |
| 10 |
Primary: 0 years |
| 11 |
Primary: 1 year |
| 12 |
Primary: 2 years |
| 13 |
Primary: 3 years |
| 14 |
Primary: 4 years |
| 15 |
Primary: 5 years |
| 16 |
Primary: 6 years |
| 17 |
Primary: 7 years |
| 19 |
Primary: unknown years |
| 20 |
Secondary: 0 years |
| 21 |
Secondary: 1 year |
| 22 |
Secondary: 2 years |
| 23 |
Secondary: 3 years |
| 24 |
Secondary: 4 years |
| 25 |
Secondary: 5 years |
| 26 |
Secondary: 6 years |
| 27 |
Secondary: 7 years |
| 29 |
Secondary: unknown years |
| 30 |
Commercial school: 0 years |
| 31 |
Commercial school: 1 year |
| 32 |
Commercial school: 2 years |
| 33 |
Commercial school: 3 years |
| 34 |
Commercial school: 4 years |
| 35 |
Commercial school: 5 years |
| 36 |
Commercial school: 6 years |
| 39 |
Commercial school: unknown years |
| 40 |
Normal/teacher-training: 0 years |
| 41 |
Normal/teacher-training: 1 year |
| 42 |
Normal/teacher-training: 2 years |
| 43 |
Normal/teacher-training: 3 years |
| 44 |
Normal/teacher-training: 4 years |
| 45 |
Normal/teacher-training: 5 years |
| 49 |
Normal/teacher-training: unknown years |
| 50 |
Industrial/technical: 0 years |
| 51 |
Industrial/technical: 1 year |
| 52 |
Industrial/technical: 2 years |
| 53 |
Industrial/technical: 3 years |
| 54 |
Industrial/technical: 4 years |
| 55 |
Industrial/technical: 5 years |
| 56 |
Industrial/technical: 6 years |
| 57 |
Industrial/technical: 7 years |
| 59 |
Industrial/technical: unknown years |
| 60 |
Other middle/secondary education: 0 years |
| 61 |
Other middle/secondary education: 1 year |
| 62 |
Other middle/secondary education: 2 years |
| 63 |
Other middle/secondary education: 3 years |
| 64 |
Other middle/secondary education: 4 years |
| 65 |
Other middle/secondary education: 5 years |
| 66 |
Other middle/secondary education: 6 years |
| 67 |
Other middle/secondary education: 7 years |
| 69 |
Other middle/secondary education: unknown years |
| 70 |
University: 0 years |
| 71 |
University: 1 year |
| 72 |
University: 2 years |
| 73 |
University: 3 years |
| 74 |
University: 4 years |
| 75 |
University: 5 years |
| 76 |
University: 6 years |
| 77 |
University: 7 years |
| 78 |
University: 8 years |
| 79 |
University: unknown years |
| 99 |
Unknown |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.