| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 2 |
0.2%
|
| 2 | 1 month but less than 3 months | 12 |
1.3%
|
| 3 | 3 months but less than 6 months | 8 |
0.8%
|
| 4 | 6 months but less than 1 year | 17 |
1.8%
|
| 5 | 1 year but less than 2 years | 80 |
8.4%
|
| 6 | More than 2 years | 164 |
17.2%
|
| 7 | Not applicable | 672 |
70.4%
|
| Sysmiss | 8841 |