| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within 1 year | 260 |
24.7%
|
| 2 | 1 year | 451 |
42.8%
|
| 3 | 2 years | 236 |
22.4%
|
| 4 | 3 years | 78 |
7.4%
|
| 5 | 4+ years | 27 |
2.6%
|
| 9 | Missing | 2 |
0.2%
|
| Sysmiss | 129 |