Summary statistics for primaryid variable in ther2017q2 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    456,863    1.58e+08    1.58e+08   3.89e+07   1.35e+09

by Jean Roth , jroth@nber.org , 8 Feb 2018