| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than a month | 0 |
0%
|
| 1 | 1-5 months | 1 |
0.1%
|
| 2 | 6-12 months | 6 |
0.4%
|
| 3 | Over a year | 30 |
2.1%
|
| 4 | 33 |
2.4%
|
|
| 99 | N/A | 1326 |
95%
|
| Sysmiss | 185 |