Opinion polling for the next Italian general election

In the run-up to the next Italian general election, which will occur no later than 1 June 2023, various organisations have been carrying out opinion polling to gauge voting intention.
Results of such opinion polls are displayed in this article. The date range is from after the previous general election, held on 4 March 2018, to the present day.
Poll results are reported at the dates when the fieldwork was done, as opposed to the date of publication. However, if such date is unknown, the date of publication will be given instead.
Party vote.
Parties/lists are listed according to their share of the vote in 2018. New parties/lists (Green Europe, Cambiamo!, Action and Italia Viva) are listed by foundation date.
Starting from the beginning of 2019, some polling agencies have polled Free and Equal (LeU), others The Left (LS), some others both. The two electoral lists, one for the 2018 general election and the other for the 2019 European Parliament election, have slightly different but partially overlapping compositions: the former includes Article One (Art.1), the latter the Communist Refoundation Party (PRC), while both include Italian Left (SI). Some polls also give data separately for Art.1 and SI.
Us with Italy and Power to the People are still active, but they have been rarely polled after 2019.