| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the last 12 months | 648 |
2.6%
|
| 2 | 1 - 2 years ago | 408 |
1.6%
|
| 3 | 2 - 3 years ago | 386 |
1.6%
|
| 4 | More than 3 years ago | 1735 |
7%
|
| 5 | Never | 21636 |
87.2%
|