| Value | Category | Cases | |
|---|---|---|---|
| 1 | no fixed duration | 235 |
53.9%
|
| 2 | seasonal | 53 |
12.2%
|
| 3 | yearly | 100 |
22.9%
|
| 4 | multiple year | 47 |
10.8%
|
| 5 | other | 1 |
0.2%
|
| Sysmiss | 37 |