Summary statistics for primaryid variable in indi2014q4 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    437,230    1.09e+08    5.68e+07   3.47e+07   1.05e+09

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