| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Currently and regularly implemented | 48 |
15.5%
|
| 2 | 2. Still implemented,but not routine | 1 |
0.3%
|
| 3 | 3. Conducted once but no longer implemented | 2 |
0.6%
|
| 4 | 4. Never conducted | 259 |
83.5%
|
| 9 | 9. Missing | 0 |
0%
|