The data presented in the Report relate to 2020 or the last available year. In order to illustrate changes over time, some issues are presented in a multi-year retrospective. For most topics, the presentation of phenomena dates back to 2010. The population projection was presented in the horizon until 2030. Selected data were compared to the average values ​​for the country. In this year's edition of the study, in selected sections, comments were made on new information introduced into the surveys of official statistics in connection with the COVID-19 pandemic in 2020.