| Value | Category | Cases | |
|---|---|---|---|
| 1 | months | 1501 |
6.3%
|
| 2 | years | 12244 |
51.6%
|
| 3 | always | 9598 |
40.5%
|
| 4 | visitor | 364 |
1.5%
|
| 9 | missing | 9 |
0%
|