| Value | Category | Cases | |
|---|---|---|---|
| 1 | I do not use copen | 1487 |
75.3%
|
| 2 | I chew or suck on it | 181 |
9.2%
|
| 3 | I snort or sniff it through my nose | 29 |
1.5%
|
| 4 | I smoke it | 29 |
1.5%
|
| 5 | I use it some other way | 248 |
12.6%
|
| Sysmiss | 21 |