No ministerial commentary is attached to release of the data. The data are preliminary when first released. Methodological changes are described in a memorandum. See the previous cell. The quarterly GDP series, the widest and most familiar index describing total output, has been selected as the reference series.
Linear interpolation is used to convert the series to a monthly one.
The quarterly accounts are published about two months and three weeks after the end of the quarter. The amount of data available at that time is much larger than that available for the monthly indicator.