| Value | Category | Cases | |
|---|---|---|---|
| 1 | COMMONLY USED | 2021 |
77.4%
|
| 2 | SOMETIMES USED | 332 |
12.7%
|
| 3 | RARELY USED | 67 |
2.6%
|
| 8 | NO USE | 27 |
1%
|
| 9 | DON'T KNOW (KN) | 165 |
6.3%
|
| Sysmiss | 176 |