REVISION POLICY

Upon collection of additional information and changes in methodology the data of previous periods is revised as follows:

	regular revision - the data released according to the advance release calendar on specific dates is preliminary and is revised upon the release of the statistics of the next period. Adjusted annual data is published, as a rule, upon the release of the statistics of the first quarter of the following year and is final;
	extraordinary revision - in exceptional cases, when significant errors and omissions have occurred or methodology changes render results incomparable, data can be adjusted retrospectively for more than a year, of which the public will be notified by a corresponding note.