| Value | Category | Cases | |
|---|---|---|---|
| 0 | less than 1 year | 128 | 
                                    
                                    1.7%
                                 | 
| 1 | 283 | 
                                    
                                    3.7%
                                 | |
| 2 | 613 | 
                                    
                                    8.1%
                                 | |
| 3 | 684 | 
                                    
                                    9%
                                 | |
| 4 | 825 | 
                                    
                                    10.9%
                                 | |
| 5 | 760 | 
                                    
                                    10%
                                 | |
| 6 | 672 | 
                                    
                                    8.9%
                                 | |
| 7 | 764 | 
                                    
                                    10.1%
                                 | |
| 8 | 810 | 
                                    
                                    10.7%
                                 | |
| 9 | 752 | 
                                    
                                    9.9%
                                 | |
| 10 | 348 | 
                                    
                                    4.6%
                                 | |
| 11 | 409 | 
                                    
                                    5.4%
                                 | |
| 12 | 514 | 
                                    
                                    6.8%
                                 | |
| 99 | 1 | 
                                    
                                    0%
                                 | |
| 101 | .Z | 676 |