67.4% of Americans aged 15-64, as of 2013. Working age population is around 200 million.<p>There&#x27;s still a decent number of single-earner married households out there -- roughly 25% of all married households. That accounts for some. 13.5% have no earner at all. That&#x27;s mostly retired couples, but there&#x27;s also some who are permanently disabled.<p>Labor force participation rate has hovered in the mid-60% range for a long time -- it increased over most of the latter 20th century, plateaued in the &#x27;90s, and dropped a lot during the Great Recession. The main change is that the rate dropped a lot for men -- from 87% in 1948 to 69% in 2014 -- and women increased from 32% to 56%. (Yes, men are still over 10 percentage points more likely to be employed than women in the US.)