Summary statistics for primaryid variable in outc2014q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    178,391    1.03e+08    4.87e+07   3.31e+07   1.00e+09

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