The latest enrollment figures from for-profit colleges suggest that damning publicity over their business practices, as well as tighter government regulations that followed it, has done deep and long-lasting damage to the industry. Forecasts for the five biggest publicly-traded schools now call for revenue declines to continue at least through fiscal 2014. Share prices are down between 32% and 86% in the past two years, turning some once-heady investments into major losers, as seen in a stock chart.