| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than a year ago | 64 |
6.2%
|
| 2 | The same | 637 |
61.5%
|
| 3 | Less than a year ago | 243 |
23.5%
|
| 9 | Don’t know | 92 |
8.9%
|