| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 998 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 1991 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1992 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1993 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1994 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1995 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1996 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 1997 | 3 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 1998 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 1999 | 4 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 2000 | 5 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 2001 | 2 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 2002 | 1 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 2003 | 5 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 2004 | 8 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| 2005 | 16 | 
                                                                 
                                    
                                    11.9%
                                 
                                                             | 
                                                        
                    |
| 2006 | 8 | 
                                                                 
                                    
                                    6%
                                 
                                                             | 
                                                        
                    |
| 2007 | 14 | 
                                                                 
                                    
                                    10.4%
                                 
                                                             | 
                                                        
                    |
| 2008 | 19 | 
                                                                 
                                    
                                    14.2%
                                 
                                                             | 
                                                        
                    |
| 2009 | 10 | 
                                                                 
                                    
                                    7.5%
                                 
                                                             | 
                                                        
                    |
| 2010 | 15 | 
                                                                 
                                    
                                    11.2%
                                 
                                                             | 
                                                        
                    |
| 2011 | 7 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 2012 | 3 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 9998 | Don't know | 6 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    
| 9999 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 99998 | Don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1576 |