A year on year comparison shows an astounding 61% decrease in electricity consumption for the January billing period (1287 kWh in 2012 versus 497 kWh this year). The average temperature for each period (January 2012 and January 2013) was 47 degrees Fahrenheit. 

Again, much of the difference is due a new 15 SEER Rheem HVAC and a Nest thermostat.