| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1987 | 1 |
11.1%
|
|
| 1991 | 2 |
22.2%
|
|
| 1998 | 1 |
11.1%
|
|
| 2001 | 3 |
33.3%
|
|
| 2003 | 1 |
11.1%
|
|
| 2004 | 1 |
11.1%
|
|
| Sysmiss | 2853 |