What Percentage of the US Population Works?

Below is a chart of the employment/population ratio for the US.  It measures the percent of the population in the US that is working.  Even though the unemployment rate is 8.2%, that only measures those looking for work who can't find jobs.  The number below takes into account the whole population.  At 58% of the population employed, the number is the lowest it's been since 1984.  The employment ratio for men is near an all time low set in 2010.

Still, compared to some other developed countries the percentage of the US population that is working is relatively high.  In Italy, less than half the population is employed.