| Value | Category | Cases | |
|---|---|---|---|
| 1 | Throughout the entire year | 9019 |
78.9%
|
| 2 | In the last three months of the year | 374 |
3.3%
|
| 3 | In the last month of the year | 35 |
0.3%
|
| 4 | Last two months of the year | 46 |
0.4%
|
| 5 | Intermittently | 1845 |
16.1%
|
| 6 | During summer break | 107 |
0.9%
|
| 98 | Don't know | 3 |
0%
|
| Sysmiss | 59207 |