Providing the most detailed data to date on how life changed in the U.S. under COVID-19, the bureau's American Community Survey 1-year estimates for 2021 showed that the share of unmarried couples living together rose, Americans became more wired and the percentage of people who identify as multiracial grew significantly. And in changes that seemed to directly reflect how the pandemic upended people's choices, fewer people moved, preschool enrollment dropped and commuters using public transportation was cut in half.

The data release offers the first reliable glimpse of life in the U.S. during the COVID-19 era, as the 1-year estimates from the 2020 survey were deemed unusable because of problems getting people to answer during the early months of the pandemic. That left a one-year data gap during a time when the pandemic forced major changes in the way people live their lives.

The survey typically relies on responses from 3.5 million households to provide 11 billion estimates each year about commuting times, internet access, family life, income, education levels, disabilities, military service and employment. The estimates help inform how to distribute hundreds of billions of dollars in federal spending.

Response rates significantly improved from 2020 to 2021, "so we are confident about the data for this year," said Mark Asiala, the survey's chief of statistical design.