15 region: document region (e.g. Transylvania, Subcarpathia, ...)
16 year: year of publication (sometimes several years can be found in one document)
The first row stands for the header. If a cell's value is unspecified, it is marked with underscore (_).
PrevDistro 1.0.0 (deprecated) can be found at https://science-data.hu/dataset.xhtml?persistentId=doi:10.5072/FK2/TRSD50
In PrevDistro 2.0.0, several new columns were added and the already existing data has undergone some fixes as well.