Summary statistics for primaryid variable in ther2015q1 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    375,340    1.14e+08    8.23e+07   3.50e+07   1.07e+09

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