Summary statistics for primaryid variable in ther2012q4 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    325,020    9.21e+07    5.59e+07   3.57e+07   8.81e+08

by Jean Roth , jroth@nber.org , 7 Apr 2017