Summary statistics for spch_pthlgst_audlgst_cnt variable in pos2018 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
sp~dlgst_cnt |     38,400    .7086823    21.88077          0       4000

by Jean Roth , jroth@nber.org , 15 Feb 2019