Frequencies for first 10,000 rows of benefittype variable in planreport2012 dataset :

                   Benefit Type |      Freq.     Percent        Cum.
--------------------------------+-----------------------------------
                                |      4,516       45.16       45.16
Actuarially Equivalent Standard |        179        1.79       46.95
              Basic Alternative |      1,082       10.82       57.77
       Defined Standard Benefit |      1,344       13.44       71.21
           Enhanced Alternative |      2,879       28.79      100.00
--------------------------------+-----------------------------------
                          Total |     10,000      100.00

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