| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 61 |
1.9%
|
| 1 | January | 56 |
1.7%
|
| 2 | Februray | 67 |
2.1%
|
| 3 | March | 120 |
3.7%
|
| 4 | April | 167 |
5.2%
|
| 5 | May | 212 |
6.6%
|
| 6 | June | 369 |
11.5%
|
| 7 | July | 585 |
18.3%
|
| 8 | August | 875 |
27.3%
|
| 9 | September | 555 |
17.3%
|
| 10 | October | 68 |
2.1%
|
| 11 | November | 36 |
1.1%
|
| 12 | December | 30 |
0.9%
|
| Sysmiss | 6699 |