| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once in 2 years | 1577 |
15.6%
|
| 2 | Once in 3 years | 3985 |
39.5%
|
| 3 | Once in 4 years | 2496 |
24.7%
|
| 4 | Once in 5 years | 2029 |
20.1%
|