| 
             年度 
             | 
            
             占比 
             | 
        ||
| 
             2015 
             | 
            
             26173 
             | 
            
             359316 
             | 
            
             7.28% 
             | 
        
| 
             2016 
             | 
            
             27735 
             | 
            
             404208 
             | 
            
             6.86% 
             | 
        
| 
             2017 
             | 
            
             24750 
             | 
            
             420144 
             | 
            
             5.89% 
             | 
        
| 
             2018 
             | 
            
             24350 
             | 
            
             432147 
             | 
            
             5.63% 
             |