Summary statistics for primaryid variable in outc2014q3 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    169,878    1.06e+08    5.23e+07   3.04e+07   1.03e+09

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