| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 904 |
66.9%
|
| 1 | January | 7 |
0.5%
|
| 2 | February | 4 |
0.3%
|
| 3 | March | 3 |
0.2%
|
| 4 | April | 6 |
0.4%
|
| 5 | May | 14 |
1%
|
| 6 | June | 7 |
0.5%
|
| 7 | July | 5 |
0.4%
|
| 8 | August | 7 |
0.5%
|
| 9 | September | 16 |
1.2%
|
| 10 | October | 11 |
0.8%
|
| 11 | November | 6 |
0.4%
|
| 12 | December | 8 |
0.6%
|
| 44 | Marked on card | 9 |
0.7%
|
| Sysmiss | 344 |
25.5%
|