WASHINGTON, USA — Fewer Americans are losing their jobs. Employers are struggling to squeeze more work from their staffs. The US is producing so much oil that imports are plunging, narrowing the trade deficit.

A string of data Thursday raised hopes for stronger hiring and US growth in coming months. More jobs would spur spending and help energize the economy, which has yet to regain full health nearly four years after the Great Recession officially ended.

And an interest rate cut Thursday by the European Central Bank, if it helps bolster the European economy, could also contribute to US growth.

The US economic reports came one day before the government will report how many jobs employers added in April. Economists think the gain will exceed the 88,000 jobs added in March, the fewest in nine months.

The government said Thursday that the number of Americans applying for unemployment aid fell last week to a seasonally adjusted 324,000 — the fewest since January 2008. Unemployment applications reflect the pace of layoffs: A steady drop means companies are shedding fewer workers. Eventually, they’ll need to hire to meet customer demand or to replace workers who quit.

The four-week average of unemployment applications, which is less volatile than the weekly figure, sank to 342,250. That was near a five-year low.

The figures for unemployment applications “point to potential improvement moving into May,” said Ted Wieseman, executive director of Morgan Stanley Research.

The government also said Thursday that the productivity of US workers barely grew from January through March after shrinking in the last three months of 2012. Productivity shows how much employees produce per hour of work. When it remains weak, employers can’t keep pulling more output from their staffs. As customer demand strengthens, they’ll need to hire.