Summary statistics for primaryid variable in outc2016q3 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    221,713    1.32e+08    8.34e+07   3.76e+07   1.26e+09

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