Summary statistics for mfr_dt variable in demo2004q4 dataset :

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
      mfr_dt |     64887    2.00e+07    225169.1   1.99e+07   7.20e+07

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