| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months | 1793 |
8.5%
|
| 2 | 12 – 23 months | 1696 |
8%
|
| 3 | 24 months or more | 17483 |
82.9%
|
| 9 | Unspecified | 123 |
0.6%
|