Did some quick math for fun.
Time for some math using emporis figures for highrises/skyscrapers.
6,281 high-rise building
933 skyscrapers
Skyscrapers + High Rises (NYC)= 7214
Now thats not including JC and the proxy cities. Only NYC core.
Factor in JC:
154 high-rise building
60 skyscraper
Skyscrapers + High Rises (NYC + JC) = 7428
Factor in Fort Lee:
37 high-rise building
3 skyscrapers
Skyscrapers + High Rises (NYC + JC + Fort Lee) = 7468
Rinse and repeat for other proxy cities. Hell, one more!
Lets do Newark, NJ:
162 high-rise building
9 skyscraper
Skyscrapers + High Rises (NYC + JC + Fort Lee + Newark) = 7639