I found [this](https://data.cityofnewyork.us/Housing-Development/NYCA_CB-3_Databook/jezm-tbut) info. Unfortunately, it's from December 2012. I found it on the third page here: https://data.cityofnewyork.us/data?browseSearch=&scope=all-data&type=&agency=New%20York%20City%20Housing%20Authority%20%28NYCHA%29
Peter and Sofya - our partners at HPD have offered to share the latest, most complete datasets of units available. This will still be a partial list (part of this challenge will be finding new ways to identify what units are subsidized but not currently on the list), but it will take you a step further than the datasets on Open Data right now. More on this very soon.
You should check out the datasets BetaNYC hosts at https://data.beta.nyc Also, you should take a look at their discussion forum. Quite a few interesting conversations on affordable housing data. https://talk.beta.nyc/search?q=affordable