Summary statistics for spch_pthlgst_audlgst_cnt variable in pos2003 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
sp~dlgst_cnt |    105,487    .2051706    12.40473          0       4000

by Jean Roth , jroth@nber.org , 17 May 2017