Unemployment during the Clinton years was ~5.4% and that was touted as boom times.
Bump
In all fairness, it was considered boom times because the unemployment rate fell steadily from a high of 7.8% in June 1992 to a low of 3.8% in April 2000.
The rate also fell from a high of 6.3% in June 2003, early in the Bush administration, to a low of 4.4% a recently as March 2007, also a strong time.
The problem now has been the trend. 4.8% isn’t a problem, the concern is that the trend for employment has been negative.