| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1996-1998 | 46 |
25%
|
| 2 | 1992-1995 | 46 |
25%
|
| 3 | 1988-1991 | 46 |
25%
|
| 4 | Before 1988 | 46 |
25%
|