Summary statistics for partdpremiumobligationwith25prem variable in planreport2015 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
partd~25prem |     36,493    30.16907    66.74773          0       1037

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