Summary statistics for primaryid variable in outc2012q4 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    191,980    9.03e+07    3.99e+07   3.45e+07   8.81e+08

by Jean Roth , jroth@nber.org , 7 Apr 2017