So that would mean 1 in 10 families that are affected on average. Seems like a lot.
concerning
Hmm… 1 in 20 individuals are affected… I get the idea being 2 adults per family, one of them affected, hence 1 in 10 families, but I think its incorrect/misleading (potentially in either direction) to say 1 in 10 families. I haven't looked at the data about how many families are single parent (which could increase the impact per family) OR how many of those 5% identified as working multiple jobs are married (I wouldn't be surprised if more of them are unmarried, since a two parent family with both working one job might be expected to not need the additional jobs).
That is a self reported survey of households that doesn't lend itself to capturing all of the people. One, participants need to respond, which a busy and tired person isn't likely to do. Two, it doesn't define job, so if you don't think of your side hustle/gig work as a job, then you won't say it is. In the survey, if you did answer, and you do have 2 jobs, but you didn't work both in the exact week that you were surveyed, then you also aren't counted. IRS data, ADP private payroll estimates are much higher, but have their own issues.