"The maximum level of employment is largely determined by nonmonetary factors that affect the structure and dynamics of the job market. These factors may change over time and may not be directly measurable. As a result, the FOMC does not specify a fixed goal for maximum employment; rather, the FOMC's policy decisions must be informed by its members' assessments of the maximum level of employment, though such assessments are necessarily uncertain and subject to revision. In the FOMC's most recent Summary of Economic Projections, Committee participants' estimates of the longer-run normal rate of unemployment had a central tendency of 5.2 to 6.0 percent, roughly unchanged from January 2011 but substantially higher than the corresponding interval several years earlier."
Put in plainer terms, the Fed doesn't do a damn thing to influence the employment rate in this country.