Before December, the last time the labor force participation rate sunk as low as 62.8 percent was February 1978, when it was also 62.8 percent. At that time, Jimmy Carter was president.
In April, the number of those not in the labor force hit a record high of 92,018,000. In May, that number declined by 9,000 to 92,009,000. Yet, the participation rate remained the same from April to May at 62.8 percent.