Summary statistics for mfr_dt variable in demo2005q1 dataset :

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
      mfr_dt |     69008    2.00e+07    303302.7   1.92e+07   9.20e+07

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