ISTANBUL Considering the increasing demand for housing and the current rate of supply, Istanbul requires an average of 122,000 new residential units per year, according to new research. The megacity with a population of more than 15 million people will need 1.22 million houses over the next 10 years, the PwC Türkiye report said. Last year's report put this figure at 1.23 million. Istanbul's population is projected to increase by 3 percent to reach 16.2 million by 2034, while the number of