PORTLAND — A college education is more expensive than ever, but a new report by the Mitchell Institute indicates it can still pay off for Mainers.

The report says Maine workers with bachelor’s degrees earn 50 percent more than those with no postsecondary degree. It also says demand for workers with postsecondary education will grow by 15,000 through 2018, compared to only 2,000 jobs created for those with high school diplomas.

Executive Director Colleen Quint says the report offers compelling evidence of the value of education, but she notes that it also points out some serious barriers, including growing tuition rates.

The Mitchell Institute bears the name of George Mitchell, the former Senate majority leader. It was created to increase access to higher education and awards 130 scholarships each year.