This is the key passage:
""Okun's Law," as it came to be known, has been tweaked over the years, and now states that for every two percentage points the economy grows above its long-term trend annually, unemployment falls by a percentage point.
Most economists peg the economy's long-term trend rate at about 2.5%, which is roughly where economists polled by The Wall Street Journal estimate growth stands in the current quarter.That means, according to Okun's Law, that the economy isn't growing fast enough to bring down unemployment."
See also Arthur M. Okun from the Library of Economics and Liberty.
And Is Okun’s Law Really Broken? By JUSTIN WOLFERS.