But let’s set a more modest goal: return to more or less full employment in 5 years –which means seven lean years of depressed employment. To keep up with population growth over those 7 years, the United States would have had to add 84 times 127,000 or 10.668 million jobs. (If that sounds high, bear in mind that we added more than 20 million jobs over the 8 Clinton years). Add in the need to make up lost ground, and we’re at around 18 million jobs over the next five years — or 300,000 a month.
Paul Krugman in The jobs deficit.