| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not available | 1925 |
47.8%
|
| 2 | Available < 2 years | 700 |
17.4%
|
| 3 | Available > 2 years | 1402 |
34.8%
|
| 7 | N/A | 6215 | |
| 8 | Invalid | 10 | |
| 9 | Missing | 95 |