WASHINGTON — The United States economy has slowed considerably this year from a year ago, according to a report from the Commerce Department released on Friday.

The country’s gross domestic product, a broad measure of the goods and services produced across the economy, grew at an annual rate of 1.3 percent in the second quarter, after having grown at an annual rate of 0.4 percent in the first quarter — a number that itself was revised sharply down from earlier estimates of 1.9 percent.