| Value | Category | Cases | |
|---|---|---|---|
| 1 | January | 6 |
1.2%
|
| 2 | February | 3 |
0.6%
|
| 3 | March | 29 |
5.8%
|
| 4 | April | 16 |
3.2%
|
| 5 | May | 46 |
9.2%
|
| 6 | June | 86 |
17.2%
|
| 7 | July | 72 |
14.4%
|
| 8 | August | 84 |
16.8%
|
| 9 | September | 56 |
11.2%
|
| 10 | October | 42 |
8.4%
|
| 11 | November | 31 |
6.2%
|
| 12 | December | 30 |
6%
|
| 13 | All year (operated every month) | 0 |
0%
|
| Sysmiss | 1974 |