| Value | Category | Cases | |
|---|---|---|---|
| 0 | 6420 |
76.3%
|
|
| 4 | 1998 |
23.7%
|
|
| 2147483622 | Don't know | 0 |
0%
|
| 2147483623 | Refused to respond | 0 |
0%
|
| 2147483647 | Not Applicable | 0 |
0%
|
| 11 | .Z | 9533 |