Americans are increasingly skeptical about the value and cost of college, with most saying they feel the U.S. higher education system is headed in the “wrong direction,” according to a new poll.

Overall, only 36% of adults say they have a “great deal” or “quite a lot” of confidence in higher education, according to the report released Monday by Gallup and the Lumina Foundation. That confidence level has declined steadily from 57% in 2015.

Republican presidential candidate Donald Trump in a podcast released on Thursday said that students graduating from U.S. colleges should get a green card to stay in the country, a proposal that runs counter to his hardline immigration stance.

During the All-In podcast hosted by Silicon Valley tech investors, angel investor Jason Calacanis told Trump that the U.S. needs to be able to legally retain more high-skilled workers, a major issue for the tech industry.

American men 25 and older who worked full-time year-round in 2020 and who held a bachelor’s degree (but not a graduate or professional degree) earned on average $103,724, according the Census Bureau data.

That was $45,699 more than the $58,025 earned on average that year by men who had only graduated from high school.

Similarly, American women 25 and older who had earned a bachelor’s degree and worked full-time in 2020 earned, on average, $30,759 more than women who had only a high school degree.