Summary statistics for primaryid variable in indi2018q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,428,287    1.62e+08    1.33e+08   3.62e+07   1.49e+09

by Jean Roth , jroth@nber.org , 8 Sep 2018