| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1033 |
4.6%
|
|
| 1 | 4290 |
19.1%
|
|
| 2 | 2762 |
12.3%
|
|
| 3 | 1982 |
8.8%
|
|
| 4 | 4+ | 4291 |
19.1%
|
| 5 | Never used | 8145 |
36.2%
|
| 9 | 31 |