| Value | Category | Cases | |
|---|---|---|---|
| 1 | January | 11 |
0.2%
|
| 2 | February | 27 |
0.5%
|
| 3 | March | 151 |
2.6%
|
| 4 | April | 4670 |
79.7%
|
| 5 | May | 953 |
16.3%
|
| 6 | June | 6 |
0.1%
|
| 7 | July | 5 |
0.1%
|
| 8 | August | 5 |
0.1%
|
| 9 | September | 2 |
0%
|
| 10 | October | 4 |
0.1%
|
| 11 | November | 11 |
0.2%
|
| 12 | December | 11 |
0.2%
|
| Sysmiss | 528 |