| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 month | 395 |
7.9%
|
| 2 | From 1 to 3 months | 172 |
3.4%
|
| 3 | From 3 to 6 months | 100 |
2%
|
| 4 | From 6 months to 1 year | 71 |
1.4%
|
| 5 | More than 1 year | 523 |
10.4%
|
| 98 | Don't know | 27 |
0.5%
|
| 99 | Refuse to answer | 8 |
0.2%
|
| Missing value | 3711 |
74.1%
|