The Constitution of Ireland has been amended 32 times since its adoption in 1937. Numerous other amendment bills have been introduced in Dáil Éireann but were not enacted. These include government bills passed by the Dáil and Seanad but rejected at referendum; bills which the government introduced but later decided not to proceed with; and the rest were private member's bills (PMBs), usually introduced by opposition TDs. No amendment PMBs passed second stage until 2015.