| Value | Category | Cases | |
|---|---|---|---|
| 1 | January | 38 |
11.7%
|
| 2 | February | 21 |
6.4%
|
| 3 | March | 24 |
7.4%
|
| 4 | April | 17 |
5.2%
|
| 5 | May | 10 |
3.1%
|
| 6 | June | 18 |
5.5%
|
| 7 | July | 7 |
2.1%
|
| 8 | August | 4 |
1.2%
|
| 9 | September | 8 |
2.5%
|
| 10 | October | 9 |
2.8%
|
| 11 | November | 10 |
3.1%
|
| 12 | December | 4 |
1.2%
|
| 98 | Unknown | 156 |
47.9%
|
| Sysmiss | 15500 |