| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| 0 | Less than 1 Year | 0 |
0%
|
| 3 | 4 |
40%
|
|
| 5 | 2 |
20%
|
|
| 7 | 2 |
20%
|
|
| 10 | 1 |
10%
|
|
| 20 | 1 |
10%
|
|
| Sysmiss | 118 |