From the NY Post:
The feds say Brooklyn’s population grew by a scant 1.6 percent while Queens’ barely budged, up just 0.1 percent, which translates to 1,300 people since 2000. Other boroughs averaged about a 4 percent jump.
Overall, the city claims New York’s population is 8.4 million, compared to the census bureau’s estimate of 8.175 million.
The discrepancy could mean hundreds of millions in lost federal aid, and city officials vowed to fight to force the feds to revise the numbers upward.
City officials say other census numbers simply don’t add up. They point out that about 170,000 new housing units have sprung up in the past decade – while the census says the population increased by only about 166,000.
Well there are an awful lot of empty luxury units and unsold craphouses, in case you haven't noticed. Now, either your prediction of a million more people by 2030 is full of shit, or no one can truly estimate the number of people in our sanctuary city full of illegal conversions. Imagine that.