The Prime Minister pointed out that with the country's total fertility rate at about 1.3, Singaporeans are far from replacing themselves.
About 30,000 babies are born as citizens every year and, to top up, about 20,000 foreigners become new citizens annually. With about 50,000 new citizens every year, Singapore can "almost sustain a stable population", he added.
"We have to manage the inflow carefully, and make sure that the people who come can integrate into our society, make sure they have the abilities and skills to contribute to our economy, and make sure their hearts are in the right place and they will become good Singaporeans," Lee said.
"You have chosen to take up Singapore citizenship because you believe in Singapore and identify yourself with what Singapore stands for - a harmonious multi-racial, multi- religious country, a fair and just society where people have opportunities to succeed if they work hard, (and) a cohesive community where Singaporeans care for one another and help one another to succeed," he said.
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"Singapore congratulates you. We welcome you," The Straits Times quoted the Prime Minister as saying.
Singapore, a country completely built by the immigrants, has an estimatedpopulation of 5.6 million, of which 3.4 million are citizens, and the rest are permanent residents as well as professionals and blue collar workers.