| Value | Category | Cases | |
|---|---|---|---|
| 1 | Gravity(valve) | 27 |
4.9%
|
| 2 | Discharge(pump) | 333 |
60%
|
| 3 | Manual scooping | 169 |
30.5%
|
| 4 | Drip | 1 |
0.2%
|
| 5 | Other | 16 |
2.9%
|
| 9 | 9 |
1.6%
|
|
| Sysmiss | 6109 |