WASHINGTON — The Federal Reserve said Friday it expects low unemployment and rising inflation will keep it on track to raise interest rates at a gradual pace over the next two years. By late 2019, the Fed says its key policy rate should be at a level that will be slightly restrictive for growth.

The Fed’s projection on rate hikes came with release of the central bank’s semiannual monetary report to Congress. Fed Chairman Jerome Powell is scheduled to testify on the report for two days next week.

The Fed last month raised its policy rate for a second time this year and projected two more hikes in 2018. The monetary report says the expectation is that further hikes will leave the rate slightly above its neutral level by late next year.

The Fed’s current projection for the neutral rate — the point where monetary policy is not stimulating growth or restraining it — is 2.9 percent. With the June rate hike, the current range for the policy rate, known as the federal funds rate, is 1.75 percent to 2 percent.

The policy report says that officials’ median outlook for the future course of interest rates would put the policy rate “somewhat above” the neutral rate by the end of 2019 and through 2020.

The report noted that the median projection for the funds rate has it rising to 2.4 percent by the end of this year, which would indicate two more rate hikes are upcoming in 2018, and then climbing to 3.1 percent by the end of 2019 and 3.4 percent by the end of 2020.

That forecast would mean that the Fed’s interest rates would cross a major milestone next year toward a point where Fed interest rates are no longer being kept low to boost economic growth and will instead begin to slightly restrain growth.