Summary statistics for primaryid variable in drug2016q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,204,281    1.27e+08    8.41e+07   3.35e+07   1.22e+09

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