| Value |
Category |
| 0 |
None |
| 1 |
Incompl. Prim. |
| 2 |
Compl. Prim and Sec1 incompl. |
| 3 |
Compl. Sec1 and incompl. Sec2 |
| 4 |
Compl. Sec2 and Tert. |
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.