Summary statistics for a7_3_c9_2 variable in hosp_rollup2552_96_2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   a7_3_c9_2 |          1      152216           .     152216     152216

by Jean Roth , jroth@nber.org , 21 Apr 2018