Summary statistics for primaryid variable in drug2016q4 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,151,027    1.42e+08    1.19e+08   4.08e+07   1.29e+09

by Jean Roth , jroth@nber.org , 18 Sep 2017