How about employment rate (from workforce)? That is measured too, at least around here.
"Employment rate
The ratio of employed persons to the population of the same age. The employment rate of the total population is calculated as the ratio of 15 to 64-year-old employed persons to the population of the same age."
Statistikcentralen - Concepts and definitions - Employment rate
Here are some US statistics about that.
"64.4 63.7 62.7 62.3 62.4 62.7 63.1 63.0 62.2 59.3 58.5 58.4 58.6 58.6" Last one being 2013.
Employment-to-population ratio - Wikipedia, the free encyclopedia