In addition, confusingly, two pollsters even publish parallel data on "active" or "certain" voters. Thus, Medián publishes different numbers for the categories of "választani tudók" and "választani tudó "biztos" szavazók", though they do not tend to differ much – the data in the table here generally refers to the latter. Tárki's polling releases always highlight results about "A pártok támogatottsága a pártválasztók körében", and those are included in the table here (and can be reviewed further back into time in this database on their website), but their website also provides a separate database with somewhat different polling data on "A pártok támogatottságának alakulása a biztos szavazó pártválasztók körében". Finally, in February 2013 Nézőpont switched to a system in which it distinguishes between "the entire population" and "active voters", but even the "active voters" sample always includes a percentage of those who are "undecided but favour a change in government" and a percentage of those who are "undecided altogether". Those numbers are given in the footnotes for each Nézőpont poll in the table.
