| Value | Category | Cases | |
|---|---|---|---|
| -2 | Don't know | 1 |
0.5%
|
| 1 | January | 20 |
10.1%
|
| 2 | February | 29 |
14.6%
|
| 3 | March | 53 |
26.6%
|
| 4 | April | 61 |
30.7%
|
| 5 | May | 24 |
12.1%
|
| 6 | June | 1 |
0.5%
|
| 7 | July | 0 |
0%
|
| 8 | August | 0 |
0%
|
| 9 | September | 0 |
0%
|
| 10 | October | 1 |
0.5%
|
| 11 | November | 3 |
1.5%
|
| 12 | December | 6 |
3%
|
| Sysmiss | 1 |