Bill's paid, paperwork's gone, so I can't provide rock-hard data. I can come pretty close, though.
No city, township of Bradford, VT. 2400sf Cape (the layout of the house can be significant), oriented almost exactly NSEW, with two full-time human occupants. Power bill runs something like $100/month, year-round. The power bill is divided into three charges:
Customer Charge/Month: $9.65
1st 200 kWh/Month:. $0.07722/KWH
Over 200 kWh/Month: $0.17243/KWH
Water is private shallow (nearly gravity feed) well, pump is 3/4HP (about 12Ah), pumping efficiency is very high. Water usage is far less than the national average of 75gal/day/person.
Sewer is private septic tank, no periodic charge.
Clothes dryer is propane, range/oven is propane, water heater is propane, house heating is wood pellets FHA (3/4HP blower). Small (10cuft) chest freezer in the basement. No whole-house cooling, one 5KBTU window air conditioner in one room (sticker estimate $42/yr operating cost). Manual setback thermostat. About half the upstairs gets closed off full-time in winter.
Lotta' factors in figuring electricity efficiency, huh?