Summary statistics for spch_pthlgst_audlgst_cnt variable in pos2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
sp~dlgst_cnt |     41,279    .6854563    21.38027          0       4000

by Jean Roth , jroth@nber.org , 20 Apr 2019