| Value | Category | Cases | |
|---|---|---|---|
| 1 | No fixed duration | 74 |
59.7%
|
| 2 | Seasonal | 6 |
4.8%
|
| 3 | Yearly | 12 |
9.7%
|
| 4 | Multiple year | 30 |
24.2%
|
| 6 | 2 |
1.6%
|
|
| Sysmiss | 5578 |