Summary statistics for primaryid variable in indi2017q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    819,167    1.44e+08    1.05e+08   3.89e+07   1.36e+09

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