Campinfan, insurance companies are no more than bookies. They profile you by where you live, how old you are, your credit rating, the brand of vehicle you drive and their history with other people with simular statistics. If by chance, someone with a simular profile had a large claim, you get to pay for it. It doesn't have to have been you. Another insurance company may have no claims from a person with a simular profile. Their quote would be much lower. It is all done with statistics and each company collects their own data.