| Value | Category | Cases | |
|---|---|---|---|
| 0 | Received no inject. | 191 |
24.6%
|
| 1 | 180 |
23.2%
|
|
| 2 | 241 |
31.1%
|
|
| 3 | 90 |
11.6%
|
|
| 4 | 7 |
0.9%
|
|
| 7 | 7+ | 1 |
0.1%
|
| 8 | Don't know | 59 |
7.6%
|
| 9 | 6 |
0.8%
|
|
| Sysmiss | 308 |