Summary statistics for partdpremiumobligationwith50prem variable in planreport2014 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
partdp~0prem |     72,594    24.45904    63.91285          0     1174.5

by Jean Roth , jroth@nber.org , 14 Apr 2016