| Value | Category | Cases | |
|---|---|---|---|
| 1 | less than 1 hour a day | 9 |
1.4%
|
| 2 | 2-3 hours per day | 29 |
4.5%
|
| 3 | more than 3 hours per day | 603 |
93.8%
|
| 4 | other | 2 |
0.3%
|