| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Currently and regularly implemented | 6 |
1.9%
|
| 2 | 2. Still implemented,but not routine | 5 |
1.6%
|
| 3 | 3. Conducted once but no longer implemented | 294 |
94.8%
|
| 4 | 4. Never conducted | 5 |
1.6%
|
| 9 | 9. Missing | 0 |
0%
|