Summary statistics for cstratm variable in nhamcsed2015 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
     cstratm |     21,061    3.13e+07     9944709   2.01e+07   4.04e+07

by Jean Roth , jroth@nber.org , 20 Nov 2017