| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 2005 | 7 | 
                                    
                                    6.2%
                                 | |
| 2006 | 32 | 
                                    
                                    28.3%
                                 | |
| 2007 | 14 | 
                                    
                                    12.4%
                                 | |
| 2008 | 9 | 
                                    
                                    8%
                                 | |
| 2009 | 21 | 
                                    
                                    18.6%
                                 | |
| 2010 | 29 | 
                                    
                                    25.7%
                                 | |
| 2011 | 1 | 
                                    
                                    0.9%
                                 | |
| Sysmiss | 97 |