From the Bureau of Labor Statistics: "All employees"

So I'll hazard a guess about a change in what part of those mining and logging industries hired: less manual workers and more office ones as they get consolidated into bigger conglomerates. But I may be wrong.

If I read this correctly: https://www.bls.gov/cps/cpsaat11.htm in 2018 you had

  - 2.6% women for logging workers
  - 5% for Mining machine operators

Assuming a 25 year career, you replace 4% of the workforce every year, so just hiring an even number of females would be more than that. (I don't know what the retirement age is for loggers, I'd guess younger than 65 based on it being a union physical labor job)