The weighting scheme is derived from National Accounts data and refined using original market information. The calculation formula corresponds to a Laspeyres chain index with the relevant weightings from the previous year. Since the required weighting schemes are derived from the aligned supply and use matrices, which are only available with a certain time-lag ( e.g.: turnover tax statistics, where the data used is approx three years behind the year under review of the “price index for capital investments”), the weighting for the last few years under review has been updated.