Employment Ratio For Prime Working Age Group Still Below Pre-Recession Level

From The New York Times, "In Fed Policy, the Exit Music May Be Hard to Hear" by N Gregory Mankiw:

A relevant measure is the employment-to-population ratio for those in the prime working age group —25 to 54. This statistic also shows the recession’s lingering effects: the ratio declined to about 75 percent from 80 percent over the course of the recession, and has recovered to only about 76 percent today. So we have recovered only about a fifth of what we lost during the downturn.