Excellent point. I was a seminarian (Carmelite). Was in my first year of simple vows, and discerned that it wasn’t my vocation. I wonder if I would have wound up in this metric?
I assume so; you were in "religious life."
I've known several men over the years who were seminarians, but chose otherwise some time before ordination. I don't know if they'd be counted.
I also met one ex-priest - he was dating a coworker at That Insurance Company, a flaky but very interesting lady - and I was told that the man who was our pastor in Norman, OK, eventually left the priesthood.