Summary statistics for primaryid variable in drug2018q3 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,651,966    1.81e+08    1.89e+08   4.01e+07   1.53e+09

by Jean Roth , jroth@nber.org , 7 Mar 2019