Summary statistics for primaryid variable in indi2013q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    454,435    9.20e+07    3.44e+07   3.04e+07   8.93e+08

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