1990 POPULATION CENSUS Detailed data based on a 2 per cent representative sample (1992)

V. EXPLANATION OF CONCEPTS

V. EXPLANATION OF CONCEPTS The volume contains the data of the 2 per cent sample selected from the material of the 1990 population census. The enumeration was carried out by personal interviews with the population by which it was not necessary to certify the declared data with documents. Thus, the character of the survey differed from current data supplies at which the data have to be supported by documents. Consequently the data of the population census may differ from the results of the regular data collections. The data were processed according to the administrative division on January 1, 1990 and the results of the earlier population censuses were alsó revised accordingly. The census moment of the earlier population censuses was 0 o'clock on January 1, 1870, December 31, 1880, 1890, 1900, 1910, 1920 and 1930, January 31, 1941, January 1, 1949, 1960, 1970 and 1980 in the same way as in the case of the 1990 population census. The retrospective data — as far as it was possible — were published according to the present definitions of the concepts, thus in somé cases they differ from those published earlier and at their compilation it was necessary to take into consideration the conceptual differences resulting from the various survey and processing methods used at the individual population censuses. Therefore, from time to time, we had to use smaller or greater estimations. In such cases, a reference was made in this chapter either within the analysis of the subject or in the footootes to the respective table. In the volume several subjects are published concerning which the earlier population censuses issued either no or only partial data, therefore, in somé cases, the time series are incomplete. The projection of the data of the 2 per cent sample over the totál population and the totál housing stock was performed by multiplying the data of the sample by fifty. The tables without indication of time in their titles contain only 1990 data. In the case of the numerical data relating to the same concept in different tables, negligible differences may occur for technological reasons. The distributional proportions were rounded individually, consequently the sums of the proportions of the partial data are not always 100.0 but may differ from it by one-two tenths upwards or downwards and the distributional proportions of the absolute figures of identical size may differ somewhat from each other. In the tables within the text, absolute figures are indicated in 1000, alsó with an individual rounding. Due to the roundings, the sum of the partial data differs from time to time from those indicated in the lines (columns) "totál" and "together", respectively. In cases when the percentage is so low that even a tenth cannot express it, 0.0 is indicated in the repective column. The signs used in the tables of chapter II as well as in the part of chapter III "1. Comprehensive data" are as follows: - no data (the statistical phenomenon observed does not occur); ' the data are not known. In the tables of other chapters of the publication, the columns where there are no data (the statistical phenomenon observed does not occur) remained blank for technical reasons. 249