IPSWICH, UNITED KINGDOM--(Marketwire - Sept. 7, 2010) - Insurance companies have been surprised recently by the increasing number of student drivers. Although the insurance premium for under-25s is notoriously high, it doesn't seem to be deterring those lucky enough to be able to afford a car at University. Around one third of 17-24 year olds held a car insurance policy at the end of 2009.