Frequencies for first 10,000 rows of benefittype variable in planreport2009 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      5,316       53.16       53.16
Actuarially Equivalent Standard |        143        1.43       54.59
              Basic Alternative |      1,036       10.36       64.95
       Defined Standard Benefit |        794        7.94       72.89
           Enhanced Alternative |      2,711       27.11      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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