| Value | Category | Cases | |
|---|---|---|---|
| 1 | Ho Chi Minh | 42 |
7.4%
|
| 2 | Hanoi | 267 |
46.9%
|
| 3 | Northern Mountain area | 88 |
15.5%
|
| 4 | Central Coastal area | 51 |
9%
|
| 5 | Mekong Delta | 40 |
7%
|
| 6 | Other | 81 |
14.2%
|
| -99 | 5 | ||
| Sysmiss | 6 |