Summary statistics for NAT_PRTM_CNT variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
NAT_PRTM_CNT |     37,813    .1491878    2.482269          0     247.14

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