| Value | Category | Cases | |
|---|---|---|---|
| 1 | Up to six months ago | 3 |
6.3%
|
| 2 | Over 6 months ago but up to one year ago | 0 |
0%
|
| 3 | Over a year ago, but less than 2 years ago | 8 |
16.7%
|
| 4 | 2 years or more ago but less than 5 years ago | 16 |
33.3%
|
| 5 | 5 years ago, or more | 19 |
39.6%
|
| 99 | Don?t know/can?t remember | 2 |
4.2%
|
| Sysmiss | 13946 |