| Value | Category | Cases | |
|---|---|---|---|
| 1 | Within the last 3 months | 5111 |
73%
|
| 2 | Between 3 months and a year ago | 80 |
1.1%
|
| 3 | More than a year ago | 235 |
3.4%
|
| 4 | Never used one | 1574 |
22.5%
|