| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than the first basic grade | 3024 |
3.7%
|
| 1 | 3415 |
4.2%
|
|
| 2 | 3094 |
3.8%
|
|
| 3 | 3003 |
3.7%
|
|
| 4 | 2425 |
3%
|
|
| 5 | 2175 |
2.7%
|
|
| 6 | 2113 |
2.6%
|
|
| 7 | 2151 |
2.6%
|
|
| 8 | 2355 |
2.9%
|
|
| 9 | 2069 |
2.5%
|
|
| 10 | 2080 |
2.6%
|
|
| 11 | 2034 |
2.5%
|
|
| 12 | 1398 |
1.7%
|
|
| 98 | don't know | 4 |
0%
|
| 99 | Missing data | 485 |
0.6%
|
| Sysmiss | 49685 |