| Value | Category | Cases | |
|---|---|---|---|
| 99 | Don't Know | 0 |
0%
|
| 2002 | 1 |
0.7%
|
|
| 2003 | 73 |
48%
|
|
| 2004 | 78 |
51.3%
|
|
| Sysmiss | 1058 |