NEW YORK ( TheStreet ) -- For-profit education companies are learning a tough lesson about supply and demand. Fourth-quarter revenue and student enrollment results released Friday by Strayer Education ( STRA ) suggest these institutions aren't doing well. Investors still holding shares in for-profit education companies are likely to see mainly losses. Strayer, headquartered in Herndon, Va., reported a 6% year-over-year revenue decline for the quarter ending in December. The company said revenue totaled $116.1 million, down from $124 million last year. Revenue was hurt by lower student enrollment and lower revenue per student. The results weren't better on a full-year basis. Strayer generated $446 million in revenue for the year, down 11% year over year from $503.6 million. And 2015 is not starting off strong, either. Strayer said enrollment for the 2015 winter term is down 1%, to 40,728 students.