| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 1 | 
                                    
                                    2.3%
                                 | |
| 1990 | 1 | 
                                    
                                    2.3%
                                 | |
| 1991 | 4 | 
                                    
                                    9.3%
                                 | |
| 1996 | 3 | 
                                    
                                    7%
                                 | |
| 1998 | 2 | 
                                    
                                    4.7%
                                 | |
| 2001 | 3 | 
                                    
                                    7%
                                 | |
| 2003 | 2 | 
                                    
                                    4.7%
                                 | |
| 2005 | 3 | 
                                    
                                    7%
                                 | |
| 2006 | 1 | 
                                    
                                    2.3%
                                 | |
| 2007 | 3 | 
                                    
                                    7%
                                 | |
| 2008 | 1 | 
                                    
                                    2.3%
                                 | |
| 2009 | 2 | 
                                    
                                    4.7%
                                 | |
| 2010 | 1 | 
                                    
                                    2.3%
                                 | |
| 2011 | 3 | 
                                    
                                    7%
                                 | |
| 9998 | ne sait pas | 13 | 
                                    
                                    30.2%
                                 | 
| 9999 | manquant | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 6621 |