| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 2003 | 1 | 
                                    
                                    1.7%
                                 | |
| 2006 | 15 | 
                                    
                                    25.4%
                                 | |
| 2007 | 8 | 
                                    
                                    13.6%
                                 | |
| 2008 | 7 | 
                                    
                                    11.9%
                                 | |
| 2009 | 8 | 
                                    
                                    13.6%
                                 | |
| 2010 | 18 | 
                                    
                                    30.5%
                                 | |
| 2011 | 2 | 
                                    
                                    3.4%
                                 | |
| Sysmiss | 151 |