Summary statistics for primaryid variable in drug2016q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,147,077    1.32e+08    9.79e+07   3.72e+07   1.23e+09

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