About 40 percent of Nanjing residents who meet China's requirements to have a second child are unwilling to do so, according to a report released by the city's family planning commission this week.

The capital of Jiangsu province is facing the lowest birthrate in recorded history at 1.3 children per couple.

Statistics show that in the 1950s and 1960s, the average number of children per couple in Nanjing was 5.8, the report said.