Nearly 10% of US families — 9.8% to be precise — included at least one unemployed family member last year. That was double the number from 2019, when 4.9% of families confronted unemployment. In all, 8.1 million families — which the Labor Department defines as a group of two or more people who live together and are related by birth, marriage or adoption — experienced a job loss last year. But the economic hardship from the pandemic isn’t spread evenly