We need more information. Is the drop in pay because women: 1. No longer want to work in the higher-paying, overtime/dangerous/lots of travel/etc... positions?

We need more information. Is the drop in pay because women: 1. No longer want to work in the higher-paying, overtime/dangerous/lots of travel/etc... positions? 2. Were discriminated when looking for new work? 3. Were discriminated when raises were handed out? etc...