| Value | Category | Cases | |
|---|---|---|---|
| 1 | no fixed duration | 4178 |
67.6%
|
| 2 | seasonal | 431 |
7%
|
| 3 | yearly | 1014 |
16.4%
|
| 4 | multiple year | 526 |
8.5%
|
| 5 | other | 33 |
0.5%
|
| Sysmiss | 11002 |