| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Currently and regularly implemented | 74 |
23.9%
|
| 2 | 2. Still implemented,but not routine | 11 |
3.5%
|
| 3 | 3. Conducted once but no longer implemented | 13 |
4.2%
|
| 4 | 4. Never conducted | 212 |
68.4%
|
| 9 | 9. Missing | 0 |
0%
|