Summary statistics for primaryid variable in indi2013q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    330,930    9.44e+07    4.39e+07   3.30e+07   9.23e+08

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