Probably just depends on what they decide to include in each category. I can tell you that when I was studying math (2008-2013), almost all of my professors we

Probably just depends on what they decide to include in each category. I can tell you that when I was studying math (2008-2013), almost all of my professors were male. But maybe "university professor" isn't the only thing they include in their data set for mathematicians, but for physics maybe it is.