It will take many years for the faculty gender pay gap to close at the current rate of change. From 2014 to 2015, women received around half a percent higher pay increase from men over the various institutional sectors. There is still a 16% and 14% gender pay gap for full professors at private non-profit 4-year institutions and public 4-year institutions respectively.
The pay gap however is not universal or as acute. Public 2-year institutions have a much lower pay gap at between 2 and 4% across all ranks. For private non-profits, women on average earn more than men at the assistant and associate professor rank at 2-year institutions and about the same at 4-year institutions. We used the Public Insight Staffing and Compensation Interactive to crunch the numbers as summarized in the graph below.