| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (don't know) | 7 |
3.6%
|
| -66 | -66 (refuse to answer) | 3 |
1.5%
|
| 1 | January | 17 |
8.6%
|
| 2 | February | 14 |
7.1%
|
| 3 | March | 15 |
7.6%
|
| 4 | April | 18 |
9.1%
|
| 5 | May | 18 |
9.1%
|
| 6 | June | 16 |
8.1%
|
| 7 | July | 14 |
7.1%
|
| 8 | August | 18 |
9.1%
|
| 9 | September | 13 |
6.6%
|
| 10 | October | 15 |
7.6%
|
| 11 | November | 18 |
9.1%
|
| 12 | December | 11 |
5.6%
|
| Sysmiss | 919 |