| Classification of Statistical Activities of CZSO - level 1 - Group | 4 | Methodology of data collection, processing, dissemination and analysis | 
                
                  
                    | Classification of Statistical Activities of CZSO - level 3 - Class | 4031 | Population and housing censuses; registers of population, dwellings and buildings | 
                
                  
                    | Classification of Statistical Activities of CZSO - level 3 - Class | 4032 | Business and agricultural censuses and registers | 
                
                  
                    | Classification of Statistical Activities of CZSO - level 3 - Class | 4033 | Household surveys | 
                
                  
                    | Classification of Statistical Activities of CZSO - level 3 - Class | 4034 | Business and agricultural surveys | 
                
                  
                    | Classification of Statistical Activities of CZSO - level 3 - Class | 4035 | Other administrative sources |