| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than a month | 3 |
0.7%
|
| 1 | 1 month | 6 |
1.4%
|
| 2 | 2 months | 3 |
0.7%
|
| 3 | 3 months | 8 |
1.8%
|
| 4 | 4 months | 8 |
1.8%
|
| 5 | 5 months | 10 |
2.3%
|
| 6 | 6 months | 11 |
2.5%
|
| 7 | 7 months | 5 |
1.1%
|
| 8 | 8 months | 5 |
1.1%
|
| 9 | 9 months | 8 |
1.8%
|
| 10 | 10 months | 9 |
2%
|
| 11 | 11 months | 10 |
2.3%
|
| 12 | 12 months | 31 |
7%
|
| 13 | More than a year | 325 |
73.5%
|
| Sysmiss | 17509 |