| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 2585 | 
                                                                 
                                    
                                    61.1%
                                 
                                                             | 
                                                        
                    
| 1 | 209 | 
                                                                 
                                    
                                    4.9%
                                 
                                                             | 
                                                        
                    |
| 2 | 232 | 
                                                                 
                                    
                                    5.5%
                                 
                                                             | 
                                                        
                    |
| 3 | 176 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    |
| 4 | 129 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 5 | 200 | 
                                                                 
                                    
                                    4.7%
                                 
                                                             | 
                                                        
                    |
| 6 | 61 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 7 | 28 | 
                                                                 
                                    
                                    0.7%
                                 
                                                             | 
                                                        
                    |
| 8 | 23 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 9 | 13 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 10 | Ten or more books | 578 | 
                                                                 
                                    
                                    13.7%
                                 
                                                             | 
                                                        
                    
| 99 | No response | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 420 |