Did a little data mining using CTBUH to find out how much is u/c currently / topped out.
May be slightly incomplete, but it gives us an idea.
Update: Same list but for proposals. Again, slightly incomplete. Just from the high rise thread alone and the news that comes in on new proposals, many are missing that are over 14 floors.
Construction wise, many more should be included as a lot of sites in demo, especially in LIC, are in the process of seeing steel/caissons.