The U.S. added a robust 222,000 jobs in June to ease worries about a slowdown in hiring. Now a fresh pair of reports add to the evidence the labor market remains quite sturdy.

The Conference Board’s employment trends index fell slightly in June, but it’s up sharply higher compared to a year ago.

“The decline is small and comes after a series of large increases since early 2017,” said Gad Levanon, chief economist of North America at the Conference Board. “Further job growth in the coming months will continue to tighten the labor market, and will likely result in further wage acceleration later this year.”

Read:Dog-eared economy? Job surge puts that idea to rest

The decline in the index, it turns out, largely stems from an increase in the percentage of companies that say they are having trouble filling open positions. Put another way, they want to hire more workers but can’t find suitable candidates.

A shortage of qualified workers, in fact, is one of the biggest complaints by business. The nation’s 4.4% unemployment rate is near a 16-year low, leaving a much smaller pool of people available for hire. If hiring slows considerably as many economists predict, the chief cause is likely to be a labor-market bottleneck.

The Federal Reserve’s labor-market conditions index, meanwhile, also fell in June, but it was positive for the 13th month in a row. The bank’s labor market conditions index slipped to 1.5 from 3.3.

Still, that’s much better compared to a year ago. The LMCI fell in the first five months of 2016. It hasn’t been negative since then, however.

