Property consultancy firm DTZ Research said it will take 5.5 years to clear the inventory of unsold private residential units in Singapore as at the end of 2008. There are now 44,661 unsold private residential units. DTZ said based on a 10-year average take-up rate of 8,000 units, selling them all will take more than five years. In its latest report, DTZ said last year's unsold inventory was much lower...