Which fields in math are the most/least in demand?

I'm an undergrad wrapping up my intro courses, and I'm interested in pursuing grad school. As I begin the process of figuring out which area I'll study long term, I'm curious if there are any fields of math that have disproportionally high/low amounts of opportunities for grad school/research/industry.

Obviously won't base my decision on this information alone, but would be good to have an expected opportunity filter to know what areas to pursue first and avoid.

Thanks!