Summary statistics for mfr_dt variable in demo2004q2 dataset :

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
      mfr_dt |     55073    2.00e+07    280232.9   1.94e+07   5.20e+07

by Jean Roth , jroth@nber.org , 18 Dec 2015