Summary statistics for spch_pthlgst_audlgst_cnt variable in pos2012 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
sp~dlgst_cnt |     42,052    .6855022    21.15208          0       4000

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