| Value | Category | Cases | |
|---|---|---|---|
| Nil | 5 |
8.8%
|
|
| Seminar Materials | 1 |
1.8%
|
|
| Training | 1 |
1.8%
|
|
| cant remember | 1 |
1.8%
|
|
| enviromental hazard | 1 |
1.8%
|
|
| nil | 24 |
42.1%
|
|
| nill | 1 |
1.8%
|
|
| nip | 1 |
1.8%
|
|
| no | 2 |
3.5%
|
|
| none | 19 |
33.3%
|
|
| o | 1 |
1.8%
|