Summary statistics for PDTRST_PRTM_CNT variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
PDTRST_PRT~T |     37,813    .0009846    .0316275          0       4.29

by Jean Roth , jroth@nber.org , 19 Apr 2019