Federal Reserve Chair Jerome H. Powell. (Jacquelyn Martin/AP)

The fall in the percentage of economic growth flowing to workers is “very troubling," a worrisome sign in an otherwise bright U.S. economy, Federal Reserve Chair Jerome H. Powell told a Senate panel Tuesday.

Testifying in front of the Senate Banking Committee, Powell expressed concern that the share of the national income going to American labor had fallen “precipitously” for more than a decade and was not reversing course.

In 2000, wages and salaries for American workers accounted for about 66 percent of the overall economy. That rate has fallen to about 62 percent, although the decline has leveled off since the end of the Great Recession, according to statistics compiled by the Brookings Institution and cited at Tuesday’s hearing by Sen. Jack Reed (D-R.I.).

“We want an economy that works for everyone,” said Powell, who was appointed by President Trump last fall to oversee the nation’s central bank. “In the last five years or so, labor share of profits has been sideways. This is very much akin to the flattening out of median incomes over the last few decades.”

The strength of the overall economy has been widely expected to eventually translate into higher wages for workers, but pay increases so far have been disappointing. Job growth, at more than 215,000 new net jobs each month, remains healthy, with the overall unemployment rate continuing to tick down. The U.S. economy is growing at a healthy clip, powered in part by strong consumer spending and business investment, Powell said.

But average hourly wages for most American workers have stalled — and, by at least one measure, fallen when accounting for inflation. Powell did express optimism that workers would soon enjoy more robust paychecks, noting wage growth may be struggling to surpass inflation only because of a temporary bump in energy and gas prices. Three-fourths of white people said in a 2017 survey they were doing “at least okay” financially, as did two-thirds of black and Hispanic people, Powell noted.

“Overall, you see inflation at a 2 percent trend and wages at 2.7 percent,” Powell said, citing a metric of inflation that excludes food and energy prices that fluctuate rapidly. “Those trends are healthy and reflected in positive surveys among workers generally.”

Despite expressing optimism that wages will increase, Powell said he was not sure how to reverse the decline of labor share of national income, noting that trend stemmed in part from “global factors" that fall outside the Federal Reserve’s purview. A tight market, such as the one the United States has, should eventually result in wage growth, according to Powell.

“The thing that we can do is to take seriously your congressional order that we seek maximum employment,” Powell said. “In tight labor markets, workers are more likely to be paid well and paid their share.”

Sen. Patrick J. Toomey (R-Pa.) asked whether trade tensions initiated by the White House could help explain stagnant wages by discouraging business investment amid uncertainty over tariffs.

“It may well be,” Powell said. “We don’t see it in the numbers yet, but we’ve heard a rising chorus of concerns."