Most Actors' Equity members don't work a single contract in a given year. Those who work at least one contract in a given year are a minority. During the 2016-2017 season, out of 51,636 total active members, 18,422 (36%) worked one or more contracts.

Source: https://actorsequity.org/aboutequity/annualstudy/2016-2017-annual-study.pdf