What is U6 unemployment rate ?
The U6 unemployment rate counts not only people without work seeking full-time employment (the more familiar U-3 rate), but also counts "marginally attached workers and those working part-time for economic reasons."
Note that some of these part-time workers counted as employed by U-3 could be working as little as an hour a week.
And the "marginally attached workers" include those who have gotten discouraged and stopped looking, but still want to work.
The age considered for this calculation is 16 years and over