[1] Data concerns trade and non-trade enterprises employing more than 9 persons. Groups of enterprises were created on the basis of the Polish Classification of Activities (PKD 2007) and a given enterprise is included to a specific category by predominating kind of activity and according to its present organizational status in mentioned period. The recorded changes of rise or fall of the volume of retail sales in particular groups of enterprises activity may result from a change in the predominating kind of activity and organisational changes (e.g. a merger of enterprises). This does not have impact on the dynamics of the total retail sales.

[2] Corrections made by reporting entities were included in cumulative data.