complied so far; refusing to do so until the EU eases the international isolation of Northern Cyprus. In February 2013, Turkish EU Minister Egemen Bağış told the Republic of Cyprus, "if you truly want salvation, truly want peace, then remove your blockade of Ercan Airport to EU member countries and Turkey will open its ports to you." Turkey's refusal to implement a trade pact between Turkey and the EU that requires the Turkish government to allow Greek Cypriot vessels to use its air and seaports has prompted the EU to freeze eight chapters in Turkey's accession talks. In November 2009, Turkish Deputy Prime Minister Cemil Çiçek declared that, should Turkey be forced to choose between supporting either EU membership or Turkish Cypriots, "[then] Turkey’s choice will forever be to stand next to the Turkish Cypriots. Everybody should understand this." Greece The issue of Turkish membership has been contentious in Greece. An opinion poll from 2005 suggested that only 25% of Greeks believe Turkey has a place in the European Union. The former Greek Prime Minister Kostas Karamanlis stated that Turkish membership of the EU could only be predicated upon, "full compliance, full accession" in December 2006. In 2005 the European Commission referred to relations between Turkey and Greece as "continuing to develop positively" while also citing a key barrier to progress being Turkey's ongoing claim of casus belli over a dispute about territorial waters boundaries. In September 2017, Greek Prime Minister, Alexis Tsipras, mentioned that halting accession talks with Turkey would be a strategic mistake by the European Union, amid a war of words raging between Germany and Turkey. Also, former Greek Prime Minister, George Papandreou, has urged European Union leaders to keep the doors open to Turkey and to continue dialogue with the Turkish government, in an apparent reference to the former German Chancellor Angela Merkel's calls for the suspension of accession talks with Turkey. Religion Turkey has a secular constitution, civil and judicial system with no official religion, although the country's most prominent imam (currently Ali Erbaş) is a civil servant and head of the Religious Affairs Directorate, or Diyanet. 82% of the Turkish population is Muslim of whom over 70% belong to the Sunni branch of Islam. A minority is affiliated with the Shi'a Alevi branch. A separate study published in 2019 found 89.5% of Turks identify as Muslim. Turkey would be the first and only Muslim-majority