| Value | Category | Cases | |
|---|---|---|---|
| 1 | January | 19 |
10.9%
|
| 2 | February | 12 |
6.9%
|
| 3 | March | 11 |
6.3%
|
| 4 | April | 10 |
5.7%
|
| 5 | May | 6 |
3.4%
|
| 6 | June | 3 |
1.7%
|
| 7 | July | 4 |
2.3%
|
| 8 | August | 9 |
5.2%
|
| 9 | September | 3 |
1.7%
|
| 10 | October | 3 |
1.7%
|
| 11 | November | 6 |
3.4%
|
| 12 | December | 5 |
2.9%
|
| 98 | Unknown | 83 |
47.7%
|
| Sysmiss | 15652 |