| Value | Category | Cases | |
|---|---|---|---|
| 1 | Up to six months ago | 6 |
0.5%
|
| 2 | Over 6 months ago but up to one year ago | 103 |
8.8%
|
| 3 | Over a year ago, but less than 2 years ago | 175 |
15%
|
| 4 | 2 years or more ago but less than 5 years ago | 337 |
28.9%
|
| 5 | 5 years ago, or more | 504 |
43.2%
|
| 99 | Don?t know/can?t remember | 41 |
3.5%
|
| Sysmiss | 12828 |