|Unit||Vol. Index 2015=100, NSA|
|Adjustments||Not Seasonally Adjusted|
Monthly statistics on retail trade published by Statistics Netherlands provide indicators (monthly indices) for the public sector, industrial organizations, businesses and other users of statistics. The indices mainly refer to turnover developments. Price and volume indices are also published for most (sub)categories.
Because of the vast number of statistical units in retail trade (approximately 80,000, SIC 52), statistics on retail trade are sample surveys. All retail trade enterprises employing 20 or more persons with retail trade as their main activity are surveyed. The remainder (i.e. enterprises employing less than 20 persons) are randomly sampled and assumed to be representative for the entire retail trade population. Only enterprises with retail trade as their main activity are sampled. The total turnover of these enterprises is taken into account.
A raising procedure is used, which involves the computation of the observed and calculated turnover per size class of the units in the sample survey. The result is then divided by the number of units in the sample (n) and multiplied by the population (N) of that particular size class. Subsequently, all raised turnovers of the size classes are added up per SIC.
Figures for the current year are provisional, figures from preceding periods are definite. Once definite figures have been published, the source will only revise the results if significant adjustments and/or corrections are needed.