| Value | Category | Cases | |
|---|---|---|---|
| 0 | NA / NR | 449895 |
97.8%
|
| 1 | Written | 1209 |
0.3%
|
| 2 | Oral | 7525 |
1.6%
|
| 9 | Not known | 1155 |
0.3%
|