| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than the first basic grade | 2275 |
2.8%
|
| 1 | 3380 |
4.1%
|
|
| 2 | 3399 |
4.2%
|
|
| 3 | 3013 |
3.7%
|
|
| 4 | 2993 |
3.7%
|
|
| 5 | 2192 |
2.7%
|
|
| 6 | 2170 |
2.7%
|
|
| 7 | 2097 |
2.6%
|
|
| 8 | 2141 |
2.6%
|
|
| 9 | 2326 |
2.9%
|
|
| 10 | 1986 |
2.4%
|
|
| 11 | 1991 |
2.4%
|
|
| 12 | 1940 |
2.4%
|
|
| 98 | don't know | 6 |
0%
|
| 99 | Missing data | 485 |
0.6%
|
| Sysmiss | 49116 |