| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 6069 |
95.7%
|
| 2 | No,Less than 1 month | 110 |
1.7%
|
| 3 | No,1-6 months | 79 |
1.2%
|
| 4 | No,more than 6 months | 87 |
1.4%
|
| Sysmiss | 3037 |