The FTE occupancy number you use here must be consistent with the FTE occupancy numbers used in all other LEED credits, including:

WEc2: Innovative Wastewater Technologies
WEc3: Water Use Reduction
SSc4.2: Alternative Transportation—Bicycle Storage and Changing Rooms
SSc4.3: Alternative Transportation—Low Emitting & Fuel Efficient Vehicles
SSc4.4: Alternative Transportation—Parking Capacity