BALTIMORE — U.S. retail sales tumbled by a record 16.4% from March to April as business shutdowns caused by the coronavirus kept shoppers away, threatened the viability of stores across the country and further weighed down a sinking economy.

The Commerce Department’s report Friday on retail purchases showed a sector that has collapsed so fast that sales over the past 12 months are down a crippling 21.6%. The severity of the decline is unrivaled for retail figures that date back to 1992. The monthly decline in April nearly doubled the previous record drop of 8.3% — set just one month earlier.

“It’s like a hurricane came and leveled the entire economy, and now we’re trying to get it back up and running,” said Joshua Shapiro, chief U.S. economist for the consultancy Maria Fiorini Ramirez.