| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Currently and regularly implemented | 94 |
30.5%
|
| 2 | 2. Still implemented,but not routine | 7 |
2.3%
|
| 3 | 3. Conducted once but no longer implemented | 1 |
0.3%
|
| 4 | 4. Never conducted | 205 |
66.6%
|
| 9 | 9. Missing | 1 |
0.3%
|