| Value | Category | Cases | |
|---|---|---|---|
| -4 | Not asked | 0 |
0%
|
| 1 | 1981 | 0 |
0%
|
| 2 | 1990 | 0 |
0%
|
| 3 | 1995-97 | 0 |
0%
|
| 4 | 1999-2004 | 1043 |
100%
|