| Value | Category | Cases | |
|---|---|---|---|
| 1 | no fixed duration | 248 |
53.3%
|
| 2 | seasonal | 47 |
10.1%
|
| 3 | yearly | 108 |
23.2%
|
| 4 | multiple year | 60 |
12.9%
|
| 5 | other | 2 |
0.4%
|
| Sysmiss | 8 |