| Value | Category | Cases | |
|---|---|---|---|
| 1 | no fixed duration | 140 |
64.5%
|
| 2 | seasonal | 29 |
13.4%
|
| 3 | yearly | 32 |
14.7%
|
| 4 | multiple year | 15 |
6.9%
|
| 5 | other | 1 |
0.5%
|
| Sysmiss | 16967 |