| Valeur | Catégorie | le cas | |
|---|---|---|---|
| 1998 | 16 |
0.5%
|
|
| 1999 | 151 |
4.3%
|
|
| 2000 | 380 |
10.9%
|
|
| 2001 | 759 |
21.8%
|
|
| 2002 | 1208 |
34.6%
|
|
| 2003 | 914 |
26.2%
|
|
| 9997 | inconsistent | 61 |
1.7%
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 8988 |