Summary statistics for primaryid variable in outc2015q4 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    205,291    1.22e+08    7.46e+07   3.79e+07   1.18e+09

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