Information from the Statistics and Census Service (DSEC) indicated that the total population was 646,800 at end-2015, an increase of 10,600 (+1.7%) year-on-year; female population accounted for 51.0% of the total. The proportion of population aged 65 and over (9.0%) increased by 0.6 percentage points year-on-year, and that of population aged 0-14 (11.9%) rose by 0.5 percentage points; meanwhile, the proportion of population aged 15-64 (79.1%) decreased by 1.1 percentage points. A total of 7,055 live births were delivered in 2015, a decrease of 305 year-on-year. The sex ratio of the newborn stood at 109.2, corresponding to 109.2 male babies per 100 female babies. Mortality totalled 2,002 in 2015, an increase of 63 year-on-year; the top three underlying causes of death were Neoplasms (734), Diseases of the Circulatory System (504) and Diseases of the Respiratory System (321). In 2015, there were 8,468 Chinese immigrants, up significantly by 2,579 (+43.8%) year-on-year; individuals granted right of abode totalled 1,784, down by 494. Meanwhile, a total of 1,778 illegal Chinese immigrants were repatriated to the Mainland, an increase of 369 year-on-year. Non-resident workers totalled 181,646 at end-2015, an increase of 11,300 year-on-year, representing a slower growth of 6.6%. In 2015, marriage registration totalled 3,719 cases, down by 366 year-on-year; a total of 1,168 divorce cases were recorded, a decrease of 140 year-on-year. At end-2015, number of households totalled 192,700, up by 3,100 year-on-year.