| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1994 | 19 |
1.6%
|
|
| 1995 | 109 |
9.2%
|
|
| 1996 | 178 |
15.1%
|
|
| 1997 | 340 |
28.8%
|
|
| 1998 | 475 |
40.3%
|
|
| 1999 | 56 |
4.7%
|
|
| 9997 | inconsistent | 2 |
0.2%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 5266 |