Good for you, I hope that you can keep too this goal of using less. I always add 10% on the my bills when I do my budget, if I buy a new appliance then I workout what the extra cost might be. e.g. My new refrigerator cost extra $20 per year on the bill when I keep to old one too!
I can keep my bill to average of within $10 the same amount each quarter. around 1000kWh power and < 300 kWh for hot water which is a different tariff.

single household in sub-tropics.
