Hate your job? Here, probably, is the answer why. Nearly half of all college grads, or 48 per cent, work in jobs that don’t require a degree, says a new U.S. study. Thirty-seven per cent have jobs that require only a high school diploma. Economists at Ohio University say the ranks of over-educated workers are growing fast, too. In 1970, one per cent of college grads drove taxis, compared to 15 per cent in 2010. Underemployment “is almost the new normal,” the study’s lead researcher told USA Today. Most depressing: it comes at a time when education costs are rising fast.