Summary statistics for mfr_dt variable in demo2009q3 dataset :

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
      mfr_dt |    121660    2.01e+07     5280.89   1.97e+07   2.01e+07

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