Summary statistics for primaryid variable in ther2015q3 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    495,824    1.23e+08    9.63e+07   3.65e+07   1.15e+09

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