| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
0.6%
|
|
| 2 | 3 |
1.8%
|
|
| 4 | 1 |
0.6%
|
|
| 5 | 1 |
0.6%
|
|
| 7 | 1 |
0.6%
|
|
| 98 | No set period | 160 |
95.8%
|
| Sysmiss | 3047 |