Regardless, I'm glad that to know that there is a metric that is narrowed to a more reasonable working age as the traditional civilian work force population metric includes everyone 16 years or older with no top end age.
The percent of potential workers actually working has been dropping since Bill Clinton was president (2000), so this isn't exactly an Obama issue. As we continue to replace the need for human labor with technology, the percentage of us who need to have a job will continue to decline. Thats a good thing, as long as we can figure out a way to ensure that ever family has an income source.
There will be a day when the need for human labor is so insignificant, we will probably have to limit the number of jobs per household to just one, and limit the number of hours worked, so that there are enough jobs for every family to have an earned income (as opposed to the vast majority of us being on welfare).
George Jetson's workday was 3 hours long, and his workweek was only one day a week. Technology produced pretty much everything that everyone wanted. Ultimately, I hope that is where we are headed.