Summary statistics for primaryid variable in outc2016q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    219,094    1.29e+08    7.85e+07   3.72e+07   1.23e+09

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