Based on a report by the Mehr News Agency (link also below), Hojat al-Islam Mohammad Mohammadi Golpaygani, the chief of staff of the office of the IRI leader said "The growth of poetry is indebted to the leader's support."
Iran boasts more than a millennium of poetry during which time no other literary genre was as revered as verse. That is only until recently. Since, the revolution, many literary critics have argued that poetry has lost its hegemony. Indeed, this loss of hegemony and other factors explain the production, publication, and significance of numerous novels in recent decades.
Golpayegani provided no statistic or explanation for the claim.