Men have been hired in that 20 month period obviously, but they replaced other men who left jobs or whose jobs disappeared, meaning no gain in jobs for men.
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An aging population means a growing medical establishment. As an oldster, I'm in such offices more often than I'd like. I wonder how much of that growth such offices account for?
Perhaps you've noticed that medical offices hire many women in non-medical and quasi-medical roles, as well as plenty of women medical professionals.
A CA eye care office I formerly patronized employed 20-22 women and 1-2 men staffing the desk, making appointments, billing, running eye tests, etc. in support of 2 ophthalmologists, and 2 optometrists. They were all busy, and productive.
That ratio seems normal, the eye office I see here in small town WY has one optometrist and 4-5 women doing various support roles.