Summary statistics for cstratm variable in nhamcsopd2007 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     cstratm |     34,473    2.96e+07     9987822   2.01e+07   4.04e+07

by Jean Roth , jroth@nber.org , 28 Mar 2016