| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Currently and regularly implemented | 156 |
50.6%
|
| 2 | 2. Still implemented,but not routine | 18 |
5.8%
|
| 3 | 3. Conducted once but no longer implemented | 16 |
5.2%
|
| 4 | 4. Never conducted | 118 |
38.3%
|
| 9 | 9. Missing | 0 |
0%
|