Summary statistics for spch_pthlgst_audlgst_cnt variable in pos2013 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
sp~dlgst_cnt |     36,364    .6826688    22.88535          0       4000

by Jean Roth , jroth@nber.org , 26 Jan 2016