German travellers continue to shun Turkey this summer

Tourists enjoy a beach in the Mediterranean resort city of Antalya, a popular destination for German tourists, in Turkey, July 25, 2016. REUTERS/Kaan Soyturk

FRANKFURT (Reuters) - Summer bookings to Turkey by German holidaymakers are down by more than half after a spate of bombings, with tourists instead heading to Greece and Egypt, according to German market researcher GfK.

Tourism, which adds about $30 billion to Turkey's gross domestic product each year, has been hammered by attacks blamed on Islamic State and Kurdish militants that have scared away tourists over the past year.