WASHINGTON (AP) — Fueled by healthier consumer spending, the U.S. economy grew in the second half of last year at the strongest pace in a decade and more than previously estimated, new government data show. The government's newly revised figures show that growth was accelerating before harsh weather in the first quarter contributed to a sharp contraction. The changes stem from a comprehensive revision the government conducts each year to the nation's gross domestic product data. GDP, the broadest measure of the economy's output of goods and services, includes everything from restaurant meals to television production to steel manufacturing. Many monthly surveys of consumer spending, manufacturing and retail businesses are updated with more comprehensive annual reports.