Comparing monetary values is of little use although quite understandable. You need to look at your usage pattern - the number of units billed each period. Have any of them been estimated? Are you able to access the meter and take regular meter readings? Can you tabulate, period for period, over the last two years what the readings and consumptions were and which if any were estimated?
Neither is there much to gain by checking your neighbours' bills. People with identical appliances can use electricity in very different ways depending on their family circumstances and readiness to economise.
My advice is to take daily readings for a week or so. These will tell you what you are using and you should, hopefully, be able to reduce your usage based on that knowledge.
Check out the ESB website (www.esb.ie) where there is a lot of very useful information on how to use electricity wisely.
