| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 2000 | 1 | 
                                    
                                    0.6%
                                 | |
| 2005 | 15 | 
                                    
                                    8.8%
                                 | |
| 2006 | 40 | 
                                    
                                    23.5%
                                 | |
| 2007 | 6 | 
                                    
                                    3.5%
                                 | |
| 2008 | 9 | 
                                    
                                    5.3%
                                 | |
| 2009 | 20 | 
                                    
                                    11.8%
                                 | |
| 2010 | 65 | 
                                    
                                    38.2%
                                 | |
| 2011 | 14 | 
                                    
                                    8.2%
                                 | |
| Sysmiss | 40 |