| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 1995 | 1 | 
                                    
                                    1.1%
                                 | |
| 2005 | 2 | 
                                    
                                    2.2%
                                 | |
| 2006 | 16 | 
                                    
                                    17.4%
                                 | |
| 2007 | 6 | 
                                    
                                    6.5%
                                 | |
| 2008 | 11 | 
                                    
                                    12%
                                 | |
| 2009 | 10 | 
                                    
                                    10.9%
                                 | |
| 2010 | 38 | 
                                    
                                    41.3%
                                 | |
| 2011 | 8 | 
                                    
                                    8.7%
                                 | |
| Sysmiss | 118 |