Summary statistics for mfr_dt variable in demo2016q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
      mfr_dt |    352,989    2.02e+07    8512.911   1.99e+07   2.02e+07

by Jean Roth , jroth@nber.org , 6 Apr 2017