Summary statistics for primaryid variable in reac2016q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |  1,014,221    1.32e+08    1.07e+08   3.35e+07   1.22e+09

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