This year, New York City will use about 55,000 GWh of electricity. Now, let's convert that to the units you are interested in.
There are 525600 minutes in a year. There are(NNN) NNN-NNNNKWh in a GWh.
55000 GWh *1000000 KWh/GWh / 525600 min/year
= 104642 KWh per minute
Reference for the initial number: http://www.bcc.cuny.edu/institutionalDevelopment/cse/Documents/CUNY%20MSR%20-%20Market%20for%20PV%20in%20NYC.pdf
Let me know if you have any questions. If not, thanks for pressing "Accept".